Which system covers the external surface of the body and manufactures vitamin D: A) endocrine system
B) integumentary system
C) nervous system
D) lymphatic system

B the integumentary system

Explanation:

Largest body system and comprises the skin and the appendages which acts to protect the body from a variety of different kinds of damage's Examples such a as lack of water or abrasion from the outside.This system includes hair,scales,feathers,or even nails.this system may help keep your body afloat and regulate temperature.

plant because they survive by water, sunlight, ex.

explanation:

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: