Read the given sentences and choose the verbs that agree with the nouns.
The dog _____ shoes.

The correct answer is: Tears

All sentences have a subject and a verb. Verbs are the action being done by subject. In English language, subjects and verbs must always agree in number. That means subjects and verbs must be either both be singular, or both be plural. If the subject is singular or he, she, it, add '-s' to the base form.
So, 'the dog tears shoes', the subject is talking about one dog (singular number) that's why add '-s' to the base form (tears).