When you look at the surface of your skin, you see (epithelial/connective) tissue.

 Epithelial tissue

Epithelial tissues are generally large sheets of cells which covers all the surfaces of the skin. Connective tissues found all around the body along with the nervous system.  

The main functions of epithelial shells are

1.  Protection of underlying tissues

2. Secretion

3. Absorption

4. Reception of sensory stimuli.

Secretion is the process of movement of material from cell or gland. It produces and releases the useful substance by gland. In human body Secretion circulates some 50 different types of hormones.

the answer would be a

no

sodium is solid at rt