Your body is covered with skin. It helps regulate body temperature, gathers information from the environment, and what other functions?

protects the body from allergy, infection, and injury
protects the body from infection, injury, and scars
protects the body from infection, scars, and water loss
protects the body from injury, infection, and water loss

helps with vitamin D synthesis

helps with sensation (touch, pressure, pain)
assists with immune function
helps with excretion of waste products through sweat
assists with maintaining hydration levels in the body