Resources can be classified in several ways: one the bases of (i) renewability, (ii) origin and (iii) utility. The objective of classification would primarily decide how we put a resource under a particular category.
These resources include all living elements of the environment. Forests and forest products, crops, birds, wildlife, fishes and other marine lives are the examples of biotic resources. These resources reproduce and regenerate themselves, hence, are renewable.
Coal and mineral oil are also biotic resources but they are non-renewable.
These resources include all non-living elements of the environment. Land, water, air and minerals like iron, copper, gold, silver, etc. are abiotic resources. They are exhaustible and non-renewable as they cannot be regenerated or reproduced.