You have to give more detail
It isn't simile, because there is no comparison to anything, and it isn't ironic.
B.the brief rejection of an obligatory role
In order to replace the infinitives with gerunds, all main verbs or actions need be have the -ing ending and eliminate the word "to". The sentence should be revised in the following way:
Hosting a party of this magnitude requires cleaning and organizing the house before getting to the part of adding decorations to the rooms.
For once in your life, try something new and exciting.
The subject of the above sewntence is A. an understood you.
The sentence talks about you and the speaker is talking to you.
The above sentence is a compound sentence. It has an independent clause and a dependent clause.
The independent clause is (You) try something new and exciting.
The dependent clause is For once in you life. It starts with a coordination conjunction and it cannot stand on its own.
