How were earthquake patterns used to provide evidence of sea floor spreading

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

Which food could be transported in a galvanized metal container?

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.