Which of the following is a type of iron ore?

The type of iron ore is "Limonite". Limonite is a common iron ore that is brownish-yellow or yellowish-brown in color, and is mainly composed of iron oxide and hydroxide minerals. It often forms in bogs, wetlands, and shallow marine environments. Limonite is not as widely used for iron production as other types of iron ore such as hematite and magnetite, but it can still be an important source of iron. It is often found in association with other minerals such as clay, sand, and gravel, and is typically mined using open-pit mining methods. Overall, limonite is an important resource for iron production, and is also used in other applications such as pigments, soil conditioner, and in the construction industry.