I. Completaţi enunţurile de mai jos: 1) Electronul distinctiv este electronul prin care .
2) Principiul lui Pauli precizează că .
3) Orbitalii monoelectronici sunt aceia care conţin .
4) Izotopii sunt specii de atomi care au acelaşi dar diferă prin .

let that person have a turn to speak : )

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.