Write a sentence using a
word with the root amo.

The amorous husband missed his wife so dearly that he called her several times each day.

Explanation:

The root word "amo" (or am-) has a Latin origin that means "love". There are several words derived from such root, many of them dropping the -o at the end -- such as amiable, or amateur. Since we were asked to use "amo", not "am", and to write a sentence with it, let's use the word "amorous". "Amorous" means "full of love". Therefore, an "amorous" husband is a spouse who loves his partner greatly:

The amorous husband missed his wife so dearly that he called her several times each day.

c. a group of tribes that formed a confederacy