To solve this analogy, we need to understand the sequence given in the first set: smile → giggle → laugh. This sequence represents increasing levels of expressing amusement or happiness.

Similarly, we need to find a word that fits logically between "disapprove" and "chide" in terms of increasing intensity of expressing disapproval.

Let's analyze the options:

Option A: reprove

To "reprove" means to express disapproval or criticism, but usually in a gentle manner. It fits the intensity level between "disapprove" (a general feeling of dissatisfaction) and "chide" (to scold or rebuke more severely).

Option B: praise

To "praise" means to express approval or admiration, which is the opposite of disapproval. Hence, it does not fit in this sequence.

Option C: reprise

"Reprise" means to repeat or return to a previous state, which is not related to the intensity of disapproval or rebuking.

Option D: grieve

To "grieve" means to feel deep sorrow, which does not fit the context of disapproval or rebuking. It is related to mourning rather than expressing disapproval.

Based on the analysis, the word that increases the intensity from "disapprove" to "chide" is "reprove."

Therefore, the appropriate option to fill the blank is:

Option A: reprove