Answer:
1. We fed the kittens that we found in the shed.
3. This is the house that I grew up in.
Step-by-step explanation:
Restrictive clauses are essential for the meaning of a sentence and are never separated from the rest of the sentence using commas, unlike the nonrestrictive ones. So, the sentences that contain a restrictive clause are 1 and 3.
Hope this helps. :)