Answer:
as particles gain energy and the material takes up more space
Explanation:
The cool air thats now in a hot area is expanding and taking up more space in the balloon, this is why the baloon starts to swell up
Choice two and five are correct!
Crocodiles and alligators are more closely related to snakes because they are all reptiles and don't have wings like birds, lol.
If the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume. When this happens, the cell must divide into smaller cells with favorable surface area/volume ratios, or cease to function. That is why cells are so small.
simpler answer: Cells are small because they need to keep a surface area to volume ratio that allows for appropriate intake of nutrients while being able to eliminate the cells waste.