Aerobic exercise increases the size and strength of muscles in the heart and helps all your muscles develop greater endurance.  Someone that works out in the gym all the time will likely have larger or smaller muscles than someone who sits at home all day?
larger

The closer objects are, the stronger the gravitational pull between them.  If Mona moves her baseballs farther apart, what happens to the gravitational pull between them increases or decreases?
decreases

Gluons make quarks attract each other more strongly the farther apart the quarks get.  Tim has a quark and pulls it closer to Rob, who also has a quark. What happens to the attraction force between the quarks it increases or it decreases?
it decreases

Bigger stars produce more energy, so their surfaces are hotter.  Jan is comparing stars, specifically a small star and the larger Sun. Given the size of each, Jan can tell that the Sun puts out heat that is lesser or greater?
lesser