Is the letter A) sunlinght and nutrient availability
Answer:
The process responsible for producing most of the Earth's oxygen is known as photosynthesis
Explanation:
In this process, plants and certain other organisms convert sunlight into oxygen and other products.
Smoking is bad perharps, but it can cause a big effect on lung growth. Which can lead to respiratory problems and infections, shortness of breath and can cause a big effect when playing any type of sports. hope this helps.