t Fork: An operation used by gitHub that creates a remote copy of an existing repository and puts that copy on your GitHub account. When changes are made to the forked repository they are stored locally until they are pushed into the online repository if a pull request is accepted.
Git Clone: Makes a local copy of a respository from GitHub. This is only sotred locally and does not exist on your GitHub account as this ia a git command.
Git Branch: Makes a new version of the main repository which lets you work on code without affecting the original code. You can then update the main code by merging the branch with main.