Answer:
The answer is A. Human activities have a greater impact on terrestrial and freshwater ecosystems.
Explanation:
The correct answer is B.) Contraction
Answer and Explanation:
Function of the skeletal muscle:
Skeletal muscles move the body. Its compression pull on ligaments, which are appended to bones. In the event that withdrawal of the muscle makes the muscle abbreviate, the bone and, in this way, the movement of the body part occurs.
Structure of the skeletal muscle:
It's appended deep down and shapes a particular organ of muscle tissue, veins, ligaments, and nerves that covers our bones and permits movement. Skeletal muscles frequently exist two by two, whereby one muscle is the essential mover and different goes about as an antagonist.
This means that they each have there own part in the cell, think baseball team. there are different players but you work together