Yo como tacos.
Verbs in the present tense are typically conjugated in a pattern. They have specific rules and conjugations that have to be followed. Find the rules and you will succeed.
1:
-son
-es
-es
-soy
-eres
2:
-estamos
-está
-estás
3:
-tiene
-tenemos
-tienen
- tiene
First of all, you need to translate this sentence in order to find out which word to use to fill the gap.
'A comb and ___ are used to comb or brush your hair.'
So, the word we need here is a brush. In Spanish, the word brush is el cepillo.