Whic group of words from each sentence is a gerund phrase. usingenergy-efficient light bulbs has been helping people to cut down on waste.
a. using energy-efficient light bulbs
b. has been helpingpeople to cut down on waste
c. helping people
d. to cut down on waste

Cupidity because the principal wants to give out important yupcoming

Allusion and illusion. an allusion is an indirect reference, whereas an illusion is something that is unreal or incorrect. each of the nouns has a related verb form: allude “to refer indirectly to,” and illude (not a very common word), which may mean “to delude or deceive” or “to subject to an illusion.”