Yes it is italicized and bolded.
The only sentence which correctly uses a verb that agrees with its subject is D) Is Yolanda at summer camp this week?
The other sentences are incorrect because:
A) In the sky <em>were </em>few clouds.
B) birds <em>live
</em>C) <em>were </em>people<em>
</em>
Prefix. Like you have PREschool before you start school, you have PREfixes before root words. Pre means before :)