What occurs during a silent trade? a. money is exchanged b. items are borrowed and then returned c. speech is limited to discussions of price and quantity needed d. goods are bartered without speaking

D. goods are bartered without speaking.

Explanation:

Silent trade, additionally called dumb barter, is a specific type of deal in which merchandise are traded with no immediate contact between the merchants. For the most part, one gathering goes to a standard spot, stores the products to be exchanged, and pulls back, some of the time calling a flag, for example, or a gong stroke. Another gathering at that point comes to leave a second arrangement of articles and withdraws. The main gathering returns, evacuating these new merchandise whenever fulfilled or abandoning them until increases are made. The second gathering at that point takes the first products to finish up the exchange.

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explanation:

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.