Concept:Polythene is indigestible and can cause blockage in the digestive tract of farm animals.
Explanation:Polythene materials cannot be digested by farm animals.
When animals graze on pasture littered with polythene, they may accidentally swallow small pieces.
These pieces can accumulate inside the body.
As a result, the alimentary canal of the animal may become blocked.
This blockage can lead to serious health problems.
Polythene is not toxic to animals.
It also does not improve the quality of the pasture.
Answer:B. the alimentary canal of farm animals could be blocked