Question

Rain, snow, hail, and ______ . are forms of precipitation.​

Answer 1

I, personally, believe that the answer to the question is sleet.

Although drizzle is technically correct, sleet is an actual form of precipitation, while a drizzle is light precipitation.

Answer 2

It's Drizzle

Step-by-step explanation:

Fairly uniform precipitation composed exclusively of fine drops very close together. Drizzle appears to float while following air currents, but unlike fog droplets, it falls to the ground. Quite often fog and drizzle occur together.