Question

which structures would you expect to find in the highlighted layer?
adipose tissue only
blood vessels, free nerve ending, and receptor cells
blood vessels only
free nerve endings only

Explanation:

The highlighted layer appears to be the epidermis. The epidermis contains blood vessels, free - nerve endings, and receptor cells which help in sensing the environment, regulating body temperature, and providing nutrients. Adipose tissue is mainly in the hypodermis. Blood vessels alone or free - nerve endings alone do not fully describe the components of the layer.

Answer:

blood vessels, free nerve ending, and receptor cells