The motor unit is composed of both the skeletal and muscular systems.
Answer:
D) Tricep, Because you have to think to control it.
Explanation:
<span>It is volcanic mud-flow. These mud-flows also known as Lahars are made up of debris and mud. The debris typically consists of rock fragments. The size and speed of the mud-flow can increase as it rolls downstream and incorporate more material as spreads such as rocks, buildings and soil.</span>
