Amajor nerve of the lumbar plexus is the
a) femoral iliohypogastric
b) ilioinguinal sciatic

Option A) Femoral nerve.

Explanation: The lumbar plexus is a network of nerves that is responsible for transmission of the signals in the skin and musculature of the lower limb to brain. The largest nerve of the lumbar plexus is the femoral nerve, which is connected to the anterior(inner) thigh muscles and some part of the skin distal to the inguinal ligament. Whereas, the ilioinguinal  nerve is located the anterior surface of the scrotum(in males) or labia majora(in females).

Result: Option A) is the correct answer.

D.release of water from the vacuoles

The type of rock she find is a sediment rock