The second place finisher will be either Serena or ___ . Would I use She or Her?

Is the sentence “ironically, although approximately seventy-one percent of the earth is covered by water, thirty-three percent of its land area is desert.” a phrase or a clause?

Which option is the most relevant piece of evidence for this claim

Brainliest asap! 98 points what goes up and down but stays in one place?