The correct conversion of the exclamatory sentence "Shut the door!" to an assertive sentence, reflecting the force of the exclamation, is Option 1: He yelled to shut the door.

Here's why:

• "Yelled" accurately captures the forceful nature of the exclamation. It implies a loud and urgent command.

• The other options soften the command too much. "Requested" implies a polite request, which is the opposite of the original sentence's tone. "Exclaimed" is closer, but still doesn't convey the same sense of urgency or command as "yelled." "Enquired to let the door be shut" is a completely different meaning and very awkward phrasing.