Option 1: This statement is incorrect. Starch is indeed found in plant cells, but glycogen is not.

Option 2: This statement is also incorrect. While glycogen is found in animal cells, starch is not.

Option 3: This statement is correct. Starch is present in plant cells as a form of energy storage, while glycogen is present in animal cells for the same purpose.

Option 4: This statement is incorrect. While starch is found in plant cells, glycogen is not.

Therefore, the correct answer is option 3. Starch is present in plant cells, and glycogen is present in animal cells.