In Minecraft, you can place and remove blocks using your bare hands or a designated tool based on the block's type of block.

Minecraft offers console commands, or cheats, enabling players to manipulate various elements of the game. They can be used for teleporting, summoning objects, changing weather, and more, thus ...

This is possible to a degree by using in-game commands made available by enabling cheats. However, this command won't necessarily change a biome's blocks, but an area's biome classification.