Valves, they are like flaps of muscle that keeps the blood in its place util its ready to be pumped along.
It is b because it just is
The answer is c Ability to contract upon freezing
Answer:
sexually transmitted disease
please follow me and mark it brainliest
An animal that only eats meat is called a carnivore
An animal that eats both meat and vegetation is called an omnivore
An animal that only eats vegetation is called a herbivore
