Which key is used to delete a character to the left side of the cursor?

Which key is used to delete a character to the left side of the cursor?
A: Backspace
B: Delete
C: Escape
D: End

The Backspace key deletes characters positioned immediately to the left of the text cursor. This makes it useful for quick corrections while typing. The Delete key removes characters on the right; Escape cancels operations; and End moves the cursor to the end of the line.