CLEP Social Sciences

Answer - D - Distance decay is defined as a decrease in the trade or interaction between different places as the distance between those places increases.

Key Takeaway: Distance decay describes the effect of relative distance upon interaction. The distance decay effect states that the interaction between two places generally declines as the relative distance between them increases. With the advent of modern communication (such as the Internet) and faster travel, distance decay has a smaller effect than it did in the past.