Answer:
Importance of sleep.
Explanation:
Because it is talking about sleep and how it affects the brain
It is B because if you look up the meaning of feverishly then you would what it is
It is also called a dative case..represented by <em>dat or d</em> ..it indicates that noun to whom something is given..like <em>she gave Jess a book..</em> here Jess is dat or prepositional case..
