Aerobic exercise increases the size and strength of muscles in the heart and helps all your muscles develop greater endurance.  If Jim works hard and increases the strength of his muscles, his endurance becomes greater or smaller?
greater

Different types of rocks weather at different rates. More resistant types of rocks will remain longer.  RJ diamond is more resistant to weathering while Tony has some sandstone which is less resistant to weathering. Whose rock will likely not last as long RJ's or Tony's?
Tony's

Breast cancer is rare in teens. It becomes more common as women get older.  What happens to Susie's chance of contracting breast cancer as she gets older increases or decreases?
increases

Exercising muscles increases their size, and bigger muscles have greater strength.  Dwayne Johnson is weaker than Kevin Hart because he exercises less and therefore his muscles have grown larger or or smaller.?
smaller.