Question

we spend the whole day exploring.
we get moon rocks to bring back.
the problem comes when we reboard
and weigh each persons pack.

zacks pack is far too heavy,
so our ship cant take off yet.
i say ill leave my rocks behind—
with rocks at home, im more than set.

zack says he needs the moon rocks
to give to his family as gifts.
he keeps telling me how happy he is
as our spaceship finally lifts.

the bolded text requires an inference, or a guess, about missing details. based on the text, which sentence is most likely to be true?

zack needs to leave the moon rocks he collected.

zack is happy that their field trip to the moon is over.

zack is grateful that the speaker gave up her rocks.

zack visits the moon with his family all the time.

Explanation:

1. Analyze Option 1: The text says Zack's pack was heavy, but the speaker offered to leave her rocks, and then the ship lifted. There's no indication Zack needed to leave his rocks. So this is incorrect.
2. Analyze Option 2: The bolded text says Zack is happy as the spaceship lifts, but the reason is likely related to keeping his moon rocks (to give as gifts) rather than the trip being over. So this is incorrect.
3. Analyze Option 3: The speaker offered to leave her rocks so the ship could take off, and Zack gets to keep his rocks (to give as gifts). It's reasonable to infer Zack is grateful to the speaker for giving up her rocks so he can keep his and the ship can take off. This fits.
4. Analyze Option 4: There's no text suggesting Zack visits the moon with his family all the time. This is not supported.

Answer:

Zack is grateful that the speaker gave up her rocks.