1
These are the ones created by nature, with no human intervention
2
These are expensive and natural resources extracted from mines
3
It is the type of fishing practiced in oceans and seas
4
It is the activity of taking care of the trees and use them to manufacture some products
5
It is an example of ground transportation
6
It refers to dig in mines to get some natural resources
7
It refers to the exchange of goods and services
8
It is an example of sea transportation
