Which sentence sets a formal tone? hello, and what a hoot it was to make your acquaintance last week. hey, good to meet you at the party last week. hey, wasn't that an awesome party last week? hello! i was very to meet you at the party last week.

The last answer sets the most formal tone; "Hello! I was very pleased to meet you at the party last week." the rest are very casual.

is there a story?

explanation:

the reason some people sacrifice their own life for another person's life could be that they are in love with them and would do anything to keep them safe a protected even if that means risking their life in the process