What exactly do you need help with?
Mac :))))))))))))))))))))))))
On the one hand, a <u>gerund</u> is a verb that acts as a noun, know for the -ing form. On the other hand, an <u>infinitive</u> is the basic form of a verb, that usually follows "to" or another verb form. The revised sentence, including both of these, is:
"To give is one of the best things people can do. Volunteering their time shows what caring people they are."
“the air was cold as ice” is a simile
“the sea of people” is a metaphor
“running around like the wind” is a simile
“stiff as a board” is a simile
“swarm of vehicles” is a metaphor
explanation: simile is comparing two things using like or as
metaphor is comparing things without using like or as
hope this helped :)