When I say “ how does social media marketing affect young people’s attitude towards the use of vaping” Is it affect or effect?
Also is the use of people’s correct?

i think you're correct, but I would change "young people's" to a younger person's.

Explanation:

i just think this sounds a little better

the answer is a.

explanation:

the clause "looking toward the south" modifies "a funnel cloud." it's not really the cloud that's "looking," but grammatically, that clause is modifying the cloud.

every four years the american people choose a new president, and 1988 is one of those years."