Strive is to endeavor as blank is to concur?

Ah, what a lovely question! "Strive" means to work hard towards a goal, just like "endeavor." In the same way, "concur" means to agree or be in harmony with someone or something. So, the Word that fits in the blank to show a similar relationship is "agree." Just like how we strive together to create beautiful art, it's important to agree and be in harmony with those around us.