Question

topic: grammar
progress:
the movement of the progress bar may be uneven because questions can be worth more or less (including zero) depending on your answer.
which sentence uses an apostrophe to create a contraction?
its important to preserve our natural resources.
we should consider our childrens futures.
earths resources are limited.
it is everybodys responsibility.

Explanation:

An apostrophe is used to create a contraction. "It's" is a contraction of "It is". The other sentences do not use an apostrophe for contraction.

Answer:

It's important to preserve our natural resources.