The acacia ants provide the acacia plant with protection against other potentially damaging insects, as well as other plants which may compete
for nutrients and sunlight, in return, the plant provides the ants with
shelter and essential nutrients for the ants and their growing larvae. What
pattern of evolution does this describe?

[content deleted] - user123802726recklesschicken

the answer would be 3

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.