Hamish's website isn't getting as many visitors as he'd like. He's heard that search engine marketing (SEM) can help, but isn't sure how it works. Can you explain what SEM enables you to do?

the animal shelter ad with animals in cages, starving and dying.

explanation:

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 !