Constipation can result from the consumption of a substance that constipation can result from the consumption of a substance that decreases water reabsorption in the small intestine stimulates peristalsis speeds up movement of material in the large intestine promotes water reabsorption in the large intestine

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promotes water reabsorption in the large intestine

Explanation:

Constipation refers to infrequent and hard to pass stool. The stool does not have a smooth passage through the large intestine and hence does not exit the colon easily.

It is increased with diet high in refined flour and less in insoluble fibre. It is also caused due to water dehydration. When there is less water in body, water is reabsorbed from the colon to replenish the water in body. Hence, the stools become very hard and difficult to pass. Hence consumption of substance that promotes water reabsorption in large intestine will increase constipation.  

the correct answer is 2 and 4