Land refers to the physical surface of the earth that is not covered by water.
Out of the given options, forests and roads can be described as land. Forests are areas of land covered with trees and underbrush, while roads are man-made pathways constructed on land.
Diamond and crude oil are not land as they are natural resources found beneath the surface of the earth. Diamond is a mineral formed deep within the earth's mantle and brought to the surface through volcanic activity or mining. Crude oil is a fossil fuel found in rock formations beneath the earth's surface, and it is extracted through drilling.