Yes, it can be fully agreed that the division of economic activities into primary, secondary and tertiary sector has a utility. The classification of an economy based on sectors shows that there are three types of economic activities. The sectors related to the primary sector are called agriculture, dairy and mining etc. Every economy derives its sustenance or income from all these resources. As we know that land is a natural resource and at the same time it is also limited. That's why we should stimulate ourselves in construction and industrial activities. For this reason the secondary sector is also considered important. Transport, communication, finance, insurance etc. are required to provide support to primary and secondary. All these services are provided by the tertiary sector. Thus we can say that the division of economic activities into primary, secondary and tertiary sector has an important utility.