What conclusion does he finally come to about his feelings about the house?
("the fall of the house of usher")
a. they are so run down of course they are scary.
b. sometimes simple things are combined in ways that we just can't analyze.
c. the house is haunted.
d. the moat or tarn around the house is what makes the house seem so frightening.

the answer is sail boat won the race , and it was going 8 feet per   second

the economic activity signified in that scenario is a. production

in general, market production makes reference to the elaboration of a product or service which is destinated for economic purposes (to be sold) at money-price in a market. such product or service has to be principally tradable for money.

there is no money exchange involved in distribution, generalized reciprocity or balanced reciprocity.