You're very welcome, Joshua. Please tell your mom that you are awesome, too. You had almost all the right answers. :-) What a great way to start the school year!!
It not end of the world
Yes, you are correct. The complete subject in the sentence "Early explorers took beads with them to Americans" is "early explorers." The subject of a sentence refers to the person, place, thing, or idea that is doing or being something in the sentence. In this case, the subject is "early explorers" because they are the ones who took the beads.