Answer:
Oxygen burns the food within their bodies and releases energy for various activities and thus it helps animal to be alive. to use it in respiration. Animals need oxygen (O) to survive. In fact, all organisms need oxygen to complete the process to burning glucose for fuel.
Explanation:
I think it is the 3rd one because health problems at older age.
Explanation:
1. they are convenient to use 2. it helps the international tade 3. it eases the exchange of material
Answer:
yeah otherwise it would have being abnormal
Answer:
At the bottom you have the producers aka auto trophic livings (which use inorganic compounds to grow, produce energy, matter and so on..). These organisms would be plants, Cyrano bacteria, over all any organisms that do photosynthesis.
