I would give them water and when they start swimming it's a proof that they have been alive, after all, how would they start moving if they have been dead
needlestick injuries
An infection that occurs through mucosal surfaces of the eyes, nose, or mouth. This type of transmission can take place through needlestick injuries, human bites, cuts, abrasions, or any break in the skin. What type of transmission involves direct or indirect contact with blood and other body fluids.
1) Plants and plankton use carbon in the atmosphere for photosynthesis (CO2 + H2O -> C6H12O8 + O2).
2) Animals eat the plankton and plants, or decomposers/detritivores break down decaying plant material. This releases carbon back into the atmosphere via cellular respiration.
3) Dead organisms are buried and become fossil fuels, burned for fuel because of its carbon content (this returns carbon to the atmosphere)
18. Water
19. Environmental impact
20. Limiting factor
21. Landfills
22. Biodiversity