Which of the following words is a synonym of ‘modify’ given in the passage?

The correct option is alter.

Explanation:

The word modify means to make partial or minor changes to something, typically to improve it or make it suitable for a particular purpose.

Let's look at the meanings of the given options:

1. alter: to change or cause to change in character or composition, typically in a small way. This is a direct synonym of 'modify'.
2. expand: to become or make larger or more extensive.
3. fix: to repair or make firm and stable.
4. widen: to make or become wider.

Therefore, the word closest in meaning to 'modify' is alter.