The echoing sound of his voice shows his excitement that his brother is communicating
Um I think personification? if there was a little more context i'd be more sure but i'm pretty sure it's personification
It is c because an adjective is a word that figures out a noun or pronoun,a conjunction is a word that joins words, phrases, or clauses,and a adverb is a <span>word that may modify a verb, an adjective.</span>
Jessica-Singular
Children-Pural
Everyone-Pural
Hope I helped! :)