Read the sentence.
relocating because of a parent's job change can be difficult for school-aged children.
which correctly identifies the gerund and its noun function in this sentence?
a) relocating/subject
b) because of a parent's job/direct object
c) can be difficult/predicate noun
d) for school-aged children/object of the preposition

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were a wealthy people. they needed some way to keep track of what they owned. they began drawing pictures. they used a reed as a pen. they drew on soft pieces of clay. the soft clay was then dried in the sun. the tablet became a permanent record. later, the sumerian drawings changed into wedge-shaped symbols. this kind of writing is called cuneiform. by putting symbols together, the sumerians could write entire sentences.