Question

definition
to make a very serious or emotional request to someone; to beg
choose an answer
implore vital
mull sullen
dont know?

Explanation:

We analyze the definitions of each option: "implore" means to beg or make a serious emotional request; "vital" means essential; "mull" means to think about; "sullen" means gloomy. The given definition matches "implore".

Answer:

A. implore