Detailed Instructions: In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.
Problem:Question: Of the two indicator species of trees for the lower montane forest, which grows taller? Passage 1:Pearson's trade to the New York Yankees was initially unpopular among fans, with Joe McCarthy receiving heavy criticism for dealing Allen—who had a 13–6 record in 1935—for Pearson. However, Pearson repaid his manager's faith in him by churning out the best statistical year in his career. His .731 winning percentage (19–7 record) was third best in the AL; he finished fifth in ERA (3.71) and strikeouts (118) and sixth in wins, though he also recorded the third-highest number of walks in the AL with 135. His performance during the first half of the season resulted in him being selected for the 1936 All-Star Game, though he did not pitch in it. In the postseason, the Yankees advanced to the World Series, where they defeated the New York Giants 4–2. In Game 4, Pearson—who insisted on being included in the rotation even after falling ill with pleurisy just before the Series—limited the Giants to just two runs while striking out seven in a complete game win. Offensively, he managed to get two hits, including a double. The 5–2 victory ended Carl Hubbell's streak of 17 consecutive regular and postseason wins.
 Passage 2:Beginning near the elevation, the hot, dry summers and cool, moist winters of the Mediterranean climate give rise to the lower montane forest zone. This zone is also known as the yellow pine forest zone. The accumulation of several feet of snow during the winter is not uncommon and can stay on the ground for several months. The diversity of tree species found in this zone make this a beautiful and interesting forest to explore. The indicator species for the lower montane forest are the ponderosa pine and the Jeffrey pine: the ponderosa pine generally occurs on the west side of the Sierra, while the Jeffrey pine occurs on the east. The lower montane forests also include trees such as California black oak, sugar pine, incense-cedar, and white fir. Animals that may be found in this zone include the dark-eyed junco, mountain chickadee, western gray squirrel, mule deer, and American black bear. The endangered Yosemite toad is found in montane forests of the central Sierra Nevada, at elevations of .
 Passage 3:The North Irish Horse is a yeomanry unit of the British Territorial Army raised in the northern counties of Ireland in the aftermath of the Second Boer War. Raised and patronized by the nobility from its inception to the present day, it was one of the first non-regular units to be deployed to France and the Low Counties with the British Expeditionary Force in 1914 during World War I and fought with distinction both as mounted troops and later as a Cyclist Regiment, achieving 18 battle honours. The regiment was reduced to a single man in the inter war years and re-raised for World War II, when it achieved its greatest distinctions in the North African and Italian campaigns. Reduced again after the Cold War, the regiment's name still exists in B (North Irish Horse) Squadron, the Scottish and North Irish Yeomanry and 40 (North Irish Horse) Signal Squadron, part of 32 Signal Regiment.

Solution:
2