Which of the following is an independent clause?

when we go to the market to buy strawberries

often go to the market to buy strawberries

buying strawberries at the market in summertime

we go to the market to buy strawberries

The clause that is an independent clause is: we go to the market to buy strawberries. An independent clause is a clause that contains a subject and a verb, conveys a complete thought and can stand on its own just like a simple sentence. The rest of the clauses are dependent clauses.