Move the "Night Vision" pack from the "Available" (left) column to the "Selected" (right) column.
For most versions of Minecraft Java Edition, follow these steps to use the downloaded .zip file: Download File Night vision.zip
Click to launch the directory on your computer. Move the "Night Vision" pack from the "Available"
The file typically refers to a popular Minecraft resource pack (also known as a texture pack) that allows players to see clearly in the dark, such as in caves or underwater, without using torches or potions. Installation Guide such as in caves or underwater