Question

highlight all the words that make up the dependent clause below.
because the ice cream truck was nearby, ryunosuke tanaka and his friends decided to buy some treats.

Explanation:

A dependent clause cannot stand alone as a sentence and starts with a subordinating conjunction (here, "Because"). The clause "Because the ice cream truck was nearby" has a subject ("the ice cream truck"), a verb ("was"), and a subordinating conjunction, making it dependent.

Answer:

Because the ice cream truck was nearby