Solution:
Concept:The process through which the organism eliminates waste is called excretion. In vertebrates, it is done with the skin, lungs, liver, and kidney.The process of excretion involves removing waste from the body. The human excretory system consists of the urethra, urine bladder, two kidneys, and two ureters. The muscular tube that transports the urine to the bladder is the pair of ureters. The removal of hazardous chemicals from the body occurs through excretion. Humans produce carbon dioxide, urea, and extra water as waste products.
Hence, the correct answer is option 4.
