Ore of copper is:

Malachite

The correct answer is option 1. Malachite.

Malachite is one of the primary ores of copper. Malachite is a green-colored mineral that is composed of copper carbonate hydroxide. It is formed through the weathering of copper ore deposits, usually containing copper carbonate minerals such as azurite or chrysocolla.

The chemical formula for malachite is \(Cu_2CO_3(OH)_2\). It is typically found in the upper oxidized portions of copper ore deposits. Malachite is often associated with other secondary copper minerals and is commonly found in conjunction with azurite, another copper mineral.

Miners and geologists often identify malachite by its characteristic bright green color and its distinctive botryoidal (grape-like) or stalactitic formations.

In summary, malachite is a significant ore of copper, providing a source of this valuable metal through its copper carbonate hydroxide composition.