Which option best corrects this sentence fragment?
In the secluded pond.
O In the secluded pond, deep in the woods, at dawn.
O Frogs and mallard ducks. Swimming in the secluded pond.
O In the secluded pond, mallard ducks swim.
O Mallard ducks in the secluded pond.
To correct the sentence fragment, you would need to add an independent caluse (sentence). Option 1, 2, 4 are all still fragments. They are either missing a noun and/or verb.
