Answer:
b
Explanation:
On Earth, human activities are changing the natural greenhouse. Over the last century the burning of fossil fuels like coal and oil has increased the concentration of atmospheric carbon dioxide (CO2). This happens because the coal or oil burning process combines carbon with oxygen in the air to make CO2.
The answer u r looking for is- Histidine. Hope I’ve helped ;)
To survive natural selection, one must be fit and be able to adapt to the environment and situations, thus why it's called survival of the fittest.
