This is because you have to let your food digest a bit before continuing your work out to prevent cramps and this like that.
Answer:
These are things that won't be going away. Natural gasses and fossil fuels will likely run out someday or become much harder to find. When you use these sources of energy, they won't be going away and therefore will be sustainable because we can always continue using them.
Does that make sense?
Explanation:
Answer:
Increases (dont mind this it's to get past the letter minimum)
Explanation:
Your answer is increases
Heterotrophs depend on photosynthesis as a source of oxygen
