Choose all the answers that apply. Hydrocarbons .

are poisonous
combine with nitrogen oxide to create smog
are mostly caused by cars
are part of the carbon-oxygen cycle
form when fuel is not completely burned

HURRY PL

"the periodic table is arranged in order of atomic number."

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.

you need to stop taking that class