Skin has pores that help the body sense odor. Skin protects the body from harmful substances. Skin brings oxygen directly into the body's bloodstream.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: What is the function of skin on the human body?
Possibilities:
- Skin has pores that help the body sense odor.
- Skin protects the body from harmful substances.
- Skin brings oxygen directly into the body's bloodstream.

Skin protects the body from harmful substances.