D) Match the words with their definitions.
1. development - c) the process of growing or changing and becoming more advanced
2. waste - e) an unnecessary or wrong use of money, substances, time, energy, abilities, etc
3. consume - a) to use fuel, energy or time, especially in large amounts
4. challenge - b) a task of situation that tests someone's abilities
5. maintain - d) cause or enable to continue
E. Complete the sentences with words from the box.
1. cost
2. non-profit
3. challenge(s)
4. take action
5. compost
6. demand (for)
To see if the mass is equal
