23. A popular brand of athletic shoe costs a local store $68 for each pair. The store sells
the shoes for $85.
By what percentage is the price increased by
the store?

i dont know this but ask your teacher for !

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

bc blah

explanation:

bc blah

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.