Answer:
A. Compounds contain fixed ratios of different elements.
Explanation:
Water always has this 2:1 ratio of hydrogen to oxygen. Like water, all compounds consist of a fixed ratio of elements. It doesn't matter how much or how little of a compound there is. It always has the same composition.
Population , we breath , you breath CO2 is increasing , so stop breathing and die somewhere lol. (ok just kidding)
Answer:
Chinese they have got high birthrate than death rate
