the tool that you use to tighten or loosen a screw on a laptop is a. nut b. screw - bolt c. nut d. allen key…

Brief Explanations:

A screwdriver is the tool used to tighten or loosen a screw. Among the options, a screw - bolt is a type of fastener, a nut is used with a bolt, an allen key is for allen - head screws, and a wrench is for nuts and bolts. The most appropriate tool for a screw is a screwdriver.

Answer:

B. screwdriver