The main function of the integumentary system is to protect the body, regulate temperature, and provide sensory information. Among the options provided, none directly describe a primary function of the integumentary system. However, "grows new tissue" could be the closest correct response as the integumentary system, which includes the skin, does have the ability to regenerate and heal itself by growing new tissue after injuries.
If you need to pick from the given options, "grows new tissue" is the most accurate choice.