What is the upper arm called

humerus

Explanation: The upper arm. The upper arm has one bone, called the humerus. At the top it meets the shoulder blade (scapula) to form the shoulder joint. At the bottom, with the two bones of the lower arm (radius and ulna), it forms the elbow joint.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

the form of energy changes and the total energy increases0l