1. (e)-to solve a problem
2. (h )- a drought - a long period of dry weather.
3. (d )- tourist attraction
4. (c ) - solar system
5. ( i ) - to protect environment
6. (b ) - chemical waste
7. (j ) - a recycling center
8. (a ) - a man of great wisdoms
9. (g ) - a moonless night
10. ( f) - to book a ticket