completely clear the area. leave the area as you found it. take anything you may need later. destroy specimens once you have observed them.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: When conducting a scientific experiment in the field, you are expected to
Possibilities:
- completely clear the area.
- leave the area as you found it.
- take anything you may need later.
- destroy specimens once you have observed them.

leave the area as you found it.