Q: Fact 1: All life relies on a relatively narrow range of pH, or acidity. Fact 2: All organisms have a life-span. Given the two facts above, organisms rely on a relatively narrow range of what?

[a]. Decibels
[b]. water
[c]. food
[d]. relativity
[e]. acidity
[f]. spectrum
[g]. balance
[h]. Light
A:
[e].