Construct four queries for a search engine.
1) "What is the difference between a vegan and vegetarian diet?"
2) "Tips for taking care of a puppy for the first time."
3) "Easy healthy meal prep ideas for work."
4) "Most popular travel destinations for summer 2021."
Complete the following task based on the instruction and optional input provided.### Instruction:
Construct four queries for a search engine.

### Output:
1) "What is the difference between a vegan and vegetarian diet?"
2) "Tips for taking care of a puppy for the first time."
3) "Easy healthy meal prep ideas for work."
4) "Most popular travel destinations for summer 2021."