Chronic poisoning from contaminated water in bangladesh can cause skin lesions and eventually lead to death from cancer.

Arsenic.

Explanation:

Cancer may be defined as the uncontrollable and uncontrolled cell division and the cells has lost the property of contact inhibition. Cancer may occur due to mutation or through biological agents.

The higher levels of the arsenic in the body may cause harmful disease in humans. The individual may suffer from vomiting, encephalopathy and lead to cancer as well. The arsenic poisoning may occur due to the contaminated water.

Thus, the correct answer is arsenic.

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.