Im pretty sure it is their feathers not for sure, but i think thats right

the answer is d.pacific ocean is the largest ocean in the world it is also the world's deepest ocean.
Drastic change in pH or temperature because the enzyme reaction may become denatured.
I think its D because it requires more force to push something over a greater distance...but i could be wrong...
Hope this helps! Please correct me if I'm wrong :)
I'm not entirely sure what you mean, but a fit animal is one that is able to out-compete with other animals in its ecosystem. It possesses some kind of advantage, which makes it easier to compete with others for food, water, shelter, and mates. Due to these qualities, the animal is obviously able to live for a good deal of time and have a greater chance of producing viable offspring.