Answer: Large intestine
The lowest portion of the GI tract, where water and electrolytes are absorbed and waste is eliminated, is the large intestine.
Step-by-step explanation:
The large intestine is the lowest portion of the gastrointestinal tract (GI), where the following occurs:
- water is absorbed
- undigested food is passed into, and watet concentrates the waste products, turning them into faeces. This faeces is finally ejected out of the body through the anus.
Thus, large intestine is the answer