This sounds like a question to something your teacher has just recently taught. I'm not sure how he/she wants you to answer but you a welcome to try; caloric intake and exercise frequency. Hope this helped.
Answer:They can tell by what type of fossils there are
Explanation:Identification of the minerals in a rock is the first thing you do. You can do it in some highly granular rocks with nothing more than a magnifying hand lens. This is called hand specimen examination. This a qualitative analysis.
1: it has a heartbeat
2: it gives off a heat signature
3: it breaths
4: it will use resources
5: it will give off some form of waste
