(C) was found is the verb in the sentence because it shows an action which in which the dog, the subject of the sentence was found. It shows an action being done on the subject of the sentence.
Answer:
It's tough to be the youngest.
Explanation:
The infinitive form of a verb is the verb in its basic form. It is most times started with 'to', and then the base verb follows. It could also simply just be the verb in it's base form. A gerund is the -ing form of a verb. So, in the sentence above, the gerund is 'being'.
Therefore, to convert this sentence to the infinitive form, the gerund, 'being' will be converted to its base form, -be. When 'to' is attached to it, it becomes the infinitive, -to be.
(C) Her allergies made her susceptible to asthma attacks.
Alaska is visited by thousands of people every summer.
* S+V. to be+past participle