Which statement is incorrect?

a. if the solution in a buret runs out, it can be refilled during a titration.

b. to ensure accurate readings of a buret, the buret must be in an upright position.

c. the volume delivered by a buret is determined by method of volume by difference.

d. parallax will produce inaccurate volume measurements.

e. all buret measurements should be recorded with two decimals places.

they are made of gases.

they have a spherical shape.

they make energy through fusion.

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.