On the given political outline map of the world, seven geographical features have been marked as A, B, C, D, E, F, and G. Identify any five with the help of the following information and write their correct names on the lines drawn near them.
- A major sea port
- A major airport
- A terminal station of a trans-continental railway
- A major area of nomadic herding
- A major area of extensive commercial grain farming
- A major area of commercial livestock rearing
- A major area of subsistence gathering
