Answer:1. the car, which took Miah months of saving to buy, is parked in the garage.
2. Sierra met the boy whose parents recently opened the restaurant across the street
3. The bicycle that Kameron has had since he was ten years old is still in great shape.
Explanation:
Explanation: the first sentence is a non-restrictive relative clause by making use of comma. The last two sentences are restrictive relative clause. It does not make use of comma. In all the three sentences, the relative clause indicator ( which, whose and that) is present.
