The choice of cave ecological research in "Stardew Valley" is a relatively unique thing in the game. When your deposit reaches 25,000, a plot will be triggered about cave ecological research, allowing you to choose fruit bats or mushrooms. You can choose either one, just make the cave produce fruits or mushrooms that can be collected later.
How to choose Stardew Valley cave ecological research
When your deposit reaches 25,000, a plot will be triggered about cave ecological research and so on, allowing you to choose fruit bats or mushrooms. Whichever you choose is fine, and the cave will produce fruits or mushrooms that can be collected later. This choice Unchangeable.
Personally, I recommend choosing fruit bats to help submit to the fruit repair community in the first year (normally, you need to buy fruit tree seeds to plant fruits, which need to grow for a whole season and can only bear fruit in the corresponding season), and what about mushrooms? It can be picked up in the mines and secret forests.