The muscle that generates the most power during elbow flexion is the

The brachialis (brachialis anticus) is a muscle in the upper arm that flexes the elbow joint. It lies deeper than the biceps brachii, and makes up part of the floor of the region known as the cubital fossa. The brachialis is the prime mover of elbow flexion.

The right order form top to bottom is

A-Limestone layers
B-Banded-iron formations
C-Metamorphic rocks with fine grains
D-Red beds
E-Chert layers