View the incomplete table. State
T
U
liquid
V
Arrangement of Atoms
are fixed; vibrate in place
move freely; spread out
are closely packed; slide past one another
have rapidly moving ionized particles
Example
w
helium
Х
Sun
In which box could "salt" be placed?
OT
Ow
Ox

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

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.