The largest buttock muscle
a. gluteus maximus
b. tibialis anterior

a. Gluteus maximus

Explanation:

The gluteus maximus muscle is one of the three gluteal muscles. As the name reflects, the gluteus maximus is one of the biggest muscle in the body. It is also heaviest muscle among the three gluteal muscles. The gluteus maximus is a superficial muscle of buttocks. Functionally, it serves as extensor muscle for femur bone of thighs.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

which fault and or fold did you find most difficult to diagram