Select the most appropriate option to fill in blank number 4.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. evidence.
The sentence refers to indications or traces i.e. evidences left behind that help palaeontologists deduce animal behavior or existence.
The examples that follow burrows and trackways are evidence of activity, not parts of the body
Hence, the chosen option will be correct.