Can someone help me with my Body Composition Quiz?!

What does fi stand for in the fitt-vp principle of exercise prescription?

Melanocytes and keratinocytes work together in protecting the skin from uv damage when keratinocytes a. provide the melanocyte with a protective shield against abrasion b. maintain the appropriate temperature so the product of the melanocyte will not denature c. maintain the appropriate ph in order for the melanocyte to synthesize melanin granules d. accumulate the melanin granules on their superficial portion, forming a uv-blocking pigment layer

The 1.5 mile run test and the 12 minute swim test are considered as what kind of test ?