I believe the answer is the green house effect.
Hope I helped !!
Answer:
What does it mean for a cell to have an optimal pH range?
it will only function properly at a neutral pH of 7.
Explanation:
Every cells performs best at optimum pH which is neutrality. Acidity or alkalinity affect cell's performance which calls for optimum range in order to get the best performance
Infants generally begin to laugh out loud at about the fourth month of life.