During which stage of sleep, also known as delta sleep, would a person have slow breathing and be difficult to wake.

in stage 3 of non-rapid-eye-movement sleep

Explanation:

this is the answer for plato

answer: with frogs you start with the skin ,peel the skin back to explore the muscle sytem ,peel back the muscle to explore the intestinal and endocrine system and follow ump by examining the eyes brain and skeletal strcuture

explanation:

i think the answer is d.