When multiple objects are selected, how do you deselect just one of them?
Press Command+Shift+A (Mac) or Ctrl+Shift+A (Windows) and click the object you want to deselect.
Shift-click the object you want to deselect
Use the Lasso tool to deselect the unwanted object.
Hold down the Option (Mac) or Alt (Windows) key and click the object you want to deselect.