That’s a pretty big question. I guess I would
put my answer into 2 main categories:
Physiology (changes inside their bodies)
and behavior (what they do).
For example, when it gets colder, some animals
might put on more fat, or grow thicker coats. All
of those are physiological responses to low
temperature in the environment. Animals can also
respond with behavior, like finding a warm rock to
lie on or migrating to a warmer climate.
Think about all the many things an animal might
have to respond to in its environment. We looked
at weather, there’s also the need for food and
water (if they live on land), predators,
competitors, potential mates, maybe offspring.
What else can you think of?
Different animals respond to different things
in different ways. Most people think of the word
“animal” as meaning only mammals. In fact,
animals could be sponges, jellyfish, worms,
insects, amphibians, birds, even corals. If
it moves at some time in its life, eats, and is
made of more than one cell, it’s an animal. Do
you think a clam needs to respond to the same
things that a seagull does? How do you think their
responses might be different?
You might want to study animal ecology.
Thanks for asking,
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