I need help with this question does anyone know?

1. 2. and 3.

Explanation:

While fat provides good insulation and organ protection from physical force, provides a lot of energy, and all energy we don't spend during the day is converted to fat for that reason and is used to make regulatory compounds it is not a part of all cell membranes in the body. Many cells are but not all.

answer; /// (nutrition) i believe is the correct answer;