A bird watcher makes a sketch of the bird. A scientist discovers fossil remains of the bird. A researcher takes a photograph of the bird. A park ranger finds a suitable habitat for the bird.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A species of bird has not been seen since the 1900s and is considered extinct. Which evidence would best disprove the claim that the bird is extinct?
Possibilities:
- A bird watcher makes a sketch of the bird.
- A scientist discovers fossil remains of the bird.
- A researcher takes a photograph of the bird.
- A park ranger finds a suitable habitat for the bird.

A researcher takes a photograph of the bird.