Change sentence to passive voice
the introduction to the book was written by the authors father.

d) the narrator even suggested that the white whale, moby d, was ubiquitous and present in every ocean at every moment.  

since he could see color, and nobody else could, he didn't find it fair that everyone else in the utopia couldn't see color but him and the giver : d

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.

stating your point of the article