General Grammar Questions. Let's perfect (if possible) Grammars!

Give these old coats to ____________ seems to need them most.

whoever or whomever?

The answer I got from other website says it's whomever but according to their rules (him+he use whoever), so I'm confused.

I will have a lot more grammar questions keep coming. :]

Does anyone have more who vs whom quizzes? I need more practice(s). lol

practices or practice?

This doesn't matter so much. Fluent speakers of English probably don't know with surety, when to apply the words. Nevertheless, I think it's whoever.

whomever is more correct :)

Yes, unfortunately, the right way to write it is whomever. I hate that, because it sounds like such a smug, prissy, proper way to talk. It's one of those rules I deliberately don't observe, because I don't need to seek approval from whomever might judge me for not using "whom."