The provided question is incomplete as it lacks the options that are necessary to answer however the complete question as follows:
Contraction and relaxation of smooth muscle fibers in the dermis influence what two changes in the skin, choose correct options:
a. surface area of the skin
b. skin tone
c. facial expressions
d. loss and conversion of heat
Answer:
The correct answer is - option A, and D.
Step-by-step explanation:
Contraction and relaxation of the smooth muscle fibers cause various actions in the body and integumentary system. The influence on the dermis by the contractions and relaxation of the smooth muscle fibers can cause physiological changes in the body.
Increase or decrease in the surface are of the skin is caused by the contraction and relaxation and other influence that is available on the given option is loss and conversion of heat present in the body by relaxation and contraction of the smooth muscle fibers.
Thus, the correct answer is - option A, and option D.