Question

do you think the classification of economic activities into Primary secondary and tertiary it's useful explain how

Answer 1

Ya it is useful to classify economic activities into Primary secondary and tertiary as this will help us to understand more deeply about the activities so classification shows us that's how work is being separated and differentiated in the way they are performed or in the way of the income .
hope it will help u

Answer 2

yes it is helpful because it will tell the exact GDP growth of each sector and how many people are working on it and how much economic prosperity is attained on them by the sectors