Answer:
Chloroplasts are the site of photosynthesis in the cell and it also consists of a double membrane. it relates to the solar panels of an amusement park because both things take energy from the sun and use it to provide energy for their systems.
Without using the scientific method, it would be much harder to determine a factor that could cause your experiment to fail. By sticking to only one of the methods you could easily destroy your experiment without the background search needed or the materials planned out.
Because its decayed organisms. So all the nutrients from that decayed organism goes into the soil and makes it rich with nutrients.