They can make food, help keep the environment clean, and make medicines.
Advantages of asexual is only one parent is needed. Disadvantages is no genetic variation. For sexual advantages is genetic variation. Disadvantage is two parents are needed.
I dont really understand where someone would get this information. was there a document or article you were supposed to read before this if so that would be very helpful.
Answer: coal
Explanation: coal is formed when layers of peat are compressed by the layers of rocks above.