Just the Right Size: Why Big Animals are Big and Little Animals are Little by Nicola Davis, illustrated by Neal Layton

From chapters.ca:
Did you ever wonder why there are no high- flying, wall- climbing, tall- building- leaping superheroes in real life? Find out what keeps big animals (like us) from engaging in astonishing feats of strength and agility, and yet why being tiny and all- powerful might have a downside. What if you could lift fifty times your weight (hello, ant), but getting wet could kill you? Or you could soar like a bird, but a cold breeze would do you in? Whether big or small, our size defines more about us than we could ever imagine.