Which of the following products has the most elastic supply?

In the context of supply elasticity, the correct answer is corn, as it typically demonstrates a more elastic supply compared to the other options provided. Elastic supply indicates that producers can adjust their production level relatively easily in response to changes in price.

Corn, being a staple crop with established agricultural practices and a relatively short growing cycle, can be planted in sizable quantities during the planting season. Farmers can adjust their planting based on market prices, making it easier to increase or decrease production. Additionally, corn production benefits from economies of scale, which further enhances its elasticity.

In contrast, other products such as fresh tomatoes and fresh salmon have more inelastic supply characteristics. Fresh tomatoes are subject to specific growing conditions and harvest times that limit how quickly farmers can respond to price changes. Similarly, salmon production, particularly in aquaculture, takes time for fish to mature, making it challenging to increase supply quickly in response to price changes. Soybeans, while also an important crop, often have a more rigid supply due to the longer growing cycles and specific conditions required for optimal production.

Thus, corn's adaptability to price variations and the ability to increase production relatively quickly informs its classification as having the most elastic supply among the options listed.