Answer:

Step-by-step explanation:
There are three degrees of adjectives:
- Positive (Normal)
- Comparative (-er)
- Superlative (-est)
While using comparative degree, we compare two things and that is why we have to use "than" after using the comparative degree.
E.g.:
In this sentence, there is a "than" after the blank, so we will use comparative degree(-er).
So, we will use faster.
![\rule[225]{225}{2}](https://img.qammunity.org/2023/formulas/english/college/eq413d752mwtrwwenrzwldxt4w1olmf1b3.png)