How many minutes does it take for a 100 watt light bulb to give off 10,000 of energy (Hint: 100 watts = 100 J/s, 1 min = 60 sec)

i just learnt this recently but i need to look through my notes again

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.