In this context, 'fruit' refers to the successful results or benefits that come from hard work or effort.
The fruit of his labor was success.
The project yielded positive fruit.
Botanically, fruits develop from the flower of a plant and contain seeds. This includes many items that are not sweet like tomatoes and peppers.
Tomatoes are classified as fruits in botany.
Cucumbers belong to the fruit category in botany.
Here, 'fruit' is used informally to describe a rewarding or desirable outcome, often in the context of achievements.
The new car was a nice fruit of their efforts.
Her hard work led to fruit in her studies.