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:
What species the cricket is
Monosaccharides / Polysaccharides
Global Positioning System (GPS)
It's body cells would have 40 chromosomes and its gametes would contain half of the total genetic information, 20 chromosomes.