The correct option is option 2: Bauxite ore. Bauxite is the main source of aluminum, and it is a mixture of various minerals, including gibbsite, boehmite, and diaspore. To extract aluminum from bauxite, a process called the Bayer process is used.

Option 1: Copper ore is not used to manufacture aluminum. Copper ore is the primary source of copper, not aluminum.

Option 3: Mica ore is also not used to manufacture aluminum. Mica is a group of minerals primarily used in electrical insulation and cosmetics. It does not contain aluminum as a major component.

Option 4: Manganese ore is also not used to manufacture aluminum. Manganese is mainly used in steel production and as a component in various alloys.

In conclusion, aluminum is manufactured from bauxite ore, making option 2 the correct answer.