Put an upright arrow for desirable human activities and a downward arrow for poor environmental sanitation practices.

The activities are:

1. Dumping garbage into the bodies of water

2. Tree-planting

3. Factories emitting hazardous gases in the atmosphere

4. Joining the mangroves' rehabilitation campaign.

5. Walking or biking to minimize the use of fuel

6. Cyanide fishing

7. Conserving electricity

8. Smoke-belching

9. Oil spilling

10. Participating in cleanliness drives in the community​

The desirable activities are: 2, 4, 5, 7 and 10

The poor practices are: 1, 3, 6, 8 and 9

Explanation:

The general explanation is that:

Activities 2, 4, 5, 7 and 10 desirable human activities because each of the activities helps in creating a sane, calm, clean, serene environment that allows human to carry out their day-to-day activities without being exposed to environmental hazard.

These activities do not favor only human, it also creates a conducive environment for animals and aids plant growth.

On the other hand, activities 1, 3, 6, 8 and 9 are poor practices and should be discouraged