Which sentence includes a dependent clause?(1 point)

Responses

The boy received a dog named Rover for his birthday.
The boy received a dog named Rover for his birthday.

They gave sandwiches to the children on paper plates.
They gave sandwiches to the children on paper plates.

On the way to the store, Nicole saw a lost cat.
On the way to the store, Nicole saw a lost cat.

When looking out the window, they saw the first leaf fall.

When looking out the window, they saw the first leaf fall.

The sentence that includes a dependent clause is: "When looking out the window, they saw the first leaf fall."