calculate the percent change in the average concentration of flavonoids in apples grown with the reflective ground cover compared with apples grown with the grass cover

answer; polycythemia is the correct answer;

b because they naturally adapt to their environment plz mark brainliest

explanation:

the main thing i would use is bricks because if there is a hurricane, there is a great possibility for the house to still stand. and i would also use plexiglass windows instead of regular windows because plexiglass isn't prone to breaking.