Which of these sentences is a run-on sentence? the cat was scared she ran. the day was wasted. we admired the beauty of the place and took pictures. she went to the movie alone and cried. she is very strong, but she couldn’t lift the shelf.

there purpose is to entertain

the answer is subjective. i personally agree with the first answer for this question.

if one isn't strictly talking about objects then the correct answer would be 'my eyes' since according to this riddle i am asleep and in order to answer/open the door i need to open my eyes first of all.

however, if one is specifically looking for an object, then the first thing i would open would be the door

hope this !