I think it’s erosion... not sure what you’re asking
Answer:
Fungi
Explanation:
The kingdom of Fungi is compromised of eukaryotic organisms that are decomposers, and chitin is used to create their cell walls.
SELECTIVE BREEDING INVOLVES CHOOSING PARENTS WITH PATICULAR CHARACTERISTICS TO BREED TOGETHER AND PRODUCE OFFSPRING WITH MORE DESIRABLE CHARACTERS . ... CROSS BREEDING INVOLVES TWO DIFFERENT BREEDS FROM THE SAME SPECIES TO CREATE A NEW BREED
This question is correct. I believe so?
Not enough info, but I'd go with:
B) hydrogen peroxide