Ответ:

1. more dangerous, the most dangerous

2. more delicious, the most delicious

3. more exciting, the most exciting

4. more expensive, the most expensive

5. more hardworking, the most hardworking

6. more interesting, the most interesting

1. more hardworking

2. more dangerous

3.  more expensive

4. more exciting

5. more delicious

6. more interesting

1. the most populated

2. the most peaceful

3. the most endangered

4.  the most poisonous

5. the most forgetful

6. the most difficult