Final answer:
The first genetically modified food was the FlavrSavr Tomato, which was introduced in 1994. It had a longer shelf life and improved flavor due to genetic modification, but it did not stay in the market due to logistical challenges.
Step-by-step explanation:
The first genetically modified food to be introduced into the market was the FlavrSavr Tomato produced in 1994. Genetic modification was used to slow down the process of softening and rotting caused by fungal infections, leading to increased shelf life. Additional genetic modification also improved the flavor of the tomato. However, the FlavrSavr Tomato did not stay in the market due to difficulties in maintaining and shipping the crop.