Answer:
2. Kevin's parents decided to increase the punishment
Step-by-step explanation:
A participle is a word usually formed from a verb which is used to modify a noun. It mostly ends in -ed or -ing.
While an infinitive phrase is a verb will begins with an infinitive [to + simple form of the verb] and includes the object or the modifier.
Here in this case, the option 2. 'Kevin's parents decided to increase the punishment' is a sentence that has both the participle and an infinitive phrase.
Participle ---> decided
Infinitive phrase ---> to increase the punishment