Question

why are they called go - yo verbs? (also called yo - go verbs)
they mean to go.
all the yo forms end in go.
they are the only verbs with an irregular yo form.

Explanation:

To determine why they are called Go - Yo (Yo - Go) verbs, we analyze each option:

• The option "They mean to go" is incorrect because not all Go - Yo verbs have the meaning of "to go".
• The option "All the YO forms end in GO" is correct. The defining characteristic of Go - Yo verbs is that in the "yo" (first - person singular) form of their conjugation, the verb form ends with "go".
• The option "They are the only verbs with an irregular YO form" is incorrect as there are other verbs with irregular "yo" forms in Spanish (or the relevant language context), and the key feature of Go - Yo verbs is about the "yo" form ending in "go", not just being irregular.

Answer:

The correct option is: All the YO forms end in GO.