What did Sir Wilfred mean when he said " The Idea was then very strong in my mind that I should soon reach the solution of the mysteries that I had been preaching about for so many years" ?

what do you mean.

do we have to write a essay?

the second sentence is a great revision in my opinion. that would be a great topic.

explanation:

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.