Wat subject is dat science or reading or math like wat is it?
Answer:
Animals that live in areas that usually have a lot of snow in the winter often change their coats to match their surroundings. Some weasels have evolved so that in the autumn they moult their brown summer coat and change to a white version. In spring they reverse the process and return to the brown version
I would say B) adaptations that do not overcome challenges of the environment. If a species lives in an environment that has many challenges that it cannot overcome or deal with, it will eventually go extinct.
Because when exercising your heart pumps more blood to your body and
it has more space to fill so it beats faster