The answer is option B "declining number and variety of the species in an area." Biodiversity is a variety of life for example a ecosystem has many species which makes it a biodiversity. Now a loss of a biodiversity would be loosing a huge amount of species in that area or ecosystem which would mean the answer is option B.
Hope this helps.
Answer: Fossil fuels are made up of dead plant life example trees, bushes, etc., and when burned they release carbon in the air
2 because if you were to multiply the bases versus the acidity it would come out to 2
