Explanation:

- Option 1: Amylum

- Correct Answer

- Amylum is another name for starch.

- Found in seeds, fruits, tubers, roots, and stems of plants.

- Commonly sourced from corn, potatoes, wheat, and rice.

- Option 2: Xanthan

- Xanthan gum is a polysaccharide used as a thickening agent in foods.

- It is not a natural source of starch.

- Option 3: Olestra

- Olestra is a fat substitute used in some processed foods.

- Derived from sugar and vegetable oil, not a type of starch.

- Option 4: Saponin

- Saponins are compounds found in various plant species.

- Known for their ability to foam, not a starch.