Select the most appropriate option to fill in blank number 5.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. footprints.
Context: The passage explains how palaeontologists study ancient animals using fossils and other evidence of activity left behind.
Footprints are a type of trace fossil, meaning they show evidence of animal activity, such as walking, running, or movement patterns.
Hence, the chosen option will be correct.