적당한 - suitable; proper; befitting; appropriate; adequate
수면 - sleep
적당한 수면 = 적당 + 수면
편식(하다) - an unbalanced diet, to eat only what I/you/we/he/she/they like(s)
자극적(이다) - There are quite lots of expressions for various kinds of situations.
- exciting; thrilling; sensational
- stimulative; irritant; incentive; pungent
But you mean in this question, that should be
"음식이 자극적이다' - too spicy
자극적 means usually something too much or too many to bear tickling you
Hope it will help.