the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose

the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose

the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose

the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose

of a quantity not able to fulfill a need or requirement

of a quantity not able to fulfill a need or requirement

of a quantity not able to fulfill a need or requirement

the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose

the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose

the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose