Is this a complete sentence, a sentence fragment, or a run-on sentence?

when the leaves fall to the ground, we rake them up into big piles.

a.
complete sentence

b.
run-on sentence

c.
sentence fragment

1) the blonde girls were playing happily near the narrow street.2)the angry gorilla ferociously ran through the deserted forest to retrieve his stolen food.3) the young man drove to work anxiously hoping that he wouldn’t be late.4) the friendly woman patiently waited for her son to get out of school.5) the musicians practiced beautifully as their harsh instructor critiqued them.hope this