The answer is A.only autotrophs can convert solar energy into chemical energy.
There are two main organs:
Kidney: purify blood from toxins, and harmful chemicals and excretes them from the body in the form of urine.
Liver: inactivates and filters toxins from the bloood and removes toxic substances that have been ingested, such as food additives, harmful minerals, toxic medications, excess hormones.
It would be D, fertilization.
Surface to volume i think
