Question

i - ready determine word meanings using known words and suffixes - er/or and - ness - instruction - level c make a word that means “the state of being ready to go to sleep.” protect nervous or sleepy ness

Explanation:

The suffix "-ness" is used to form a noun from an adjective. "Sleepy" is an adjective meaning ready to go to sleep. Adding "-ness" to "sleepy" forms a noun representing the state.

Answer:

sleepiness