Question

this group of muscles is found on the posterior thigh and flexes the knee. rectus femoris latissimus dorsi hamstrings trapezius

Explanation:

The rectus femoris is on the anterior thigh, the latissimus dorsi is on the back, the trapezius is on the upper - back and neck. The hamstrings are located on the posterior thigh and are responsible for knee flexion.

Answer:

Hamstrings