Right answer: Nosotros necesitamos
Firstly, it is important to note that in Spanish the verbs must be conjugated according the subject or the noun in the sentence and must match in number and genre with the noun.
Now, the verb necesitar (to need) is conjugated with the first person in plural nosotros (we) as:
(Nosotros) necesitamos
We need
This is because we are talking about two boys (plural subject)
