Do not click that link the other person wrote, it will either be a way to get your personal info, or a way to get him more points. Stay safe please
The punctuation mark that should be placed after the close quotation mark is a period. A period is used at the end of the sentence to indicate where the sentence fully stops. In the example given above, it is made up of two complete sentences with different thoughts each. Therefore, it should be written like this: I understand that "time is of the essence". I just need to find my keys so we can leave!
Answer:
Smog is a mixture of fog and smoke. hope this is enough to help you with your question :)