an ecosystem requires __________different plants and animals to be healthy
most of the world's things live in _________
_________ things in an ecosystem rely on each other

if u can answer ANY then answer this with the one you can answer
if you can answer all of them then THANK YOU
I know a LOT about this topic but the top one seems to have a weird grammar issue that I can't understand- it needs a specific work and IDK what

the second one also has MANY possible answers
so does the third

but I need help figuring out exactly what words fit in the blanks

thanks guys!