Agricultural sector plays a strategic role in the process of economic development of a country.

It has already made a significant contribution to the economic prosperity of advanced countries and its role in the economic development of less developed countries is of vital importance.

agriculture makes its contribution to economic development in several ways, viz.,:

(1) By providing food and raw material to non-agricultural sectors of the economy,

(2) By creating demand for goods produced in non-agricultural sectors, by the rural people on the strength of the purchasing power, earned by them on selling the marketable surplus,

(3) By providing investable surplus in the form of savings and taxes to be invested in non-agricultural sector,

(4) By earning valuable foreign exchange through the export of agricultural products,

(5) Providing employment to a vast army of uneducated, backward and unskilled labour. As a matter of fact, if the process of economic development is to be initiated and made self-sustaining, it must begin for agricultural sector.

I think development of agriculture means development of both rural and country economy.
Let's see how...

As we know,the country depends ultimately on the agricultural sector and it plays a wide and positive role for the country becoz food is a basic need of each citizen of our country.

Rural means village area i.e., the most basic source of income and food for villagers is offcourse agriculture.

Hence ,they both are completly dependent on agriculture.
Thus, we can say that this statement is true!!