It depends on your teacher, it should be A. It could be B if that’s what your teacher wants but I would go with A.
Skeletal muscle just attach to the skeleton of the body by itself.
The answer is c because many things are losing their habitat and food sources
Answer:
They support unique ecosystems and their communities of organisms in the deep ocean. They help regulate ocean chemistry and circulation. They also provide a laboratory in which scientists can study changes to the ocean and how life on Earth could have begun.
Explanation: hey are old, preserve a lot of old organisms, and help the ecosystem
