Question

when the arrector pili muscles contract, shivering occurs. \goose bumps\ are formed. the skin changes color. sweat is released from sweat glands. hairs are shed.

Explanation:

Arrector pili muscles are small muscles attached to hair follicles. When they contract, they pull the hair follicles upright, creating "goose bumps". This is a physiological response often triggered by cold or emotional states.

Answer:

"goose bumps" are formed.