Answer:
How to get enough energy for daily life
Explanation:
All living things need to get energy from food, and finding food is definetly a very VERY big challenge.
Petroleum is not a source of coal or coal-precursor.
Answer:
there would be less birds.
Explanation:
If the population decreases the birds are dying. Therefore leaving the planet with less birds.
Answer:
I believe the answer is number 3: an increasing amount of the lighted side of the Moon.
Explanation:
When the Moon changes from new Moon to full Moon, the lighted side is shown more and more, increasing from the right side to the left until you can see the whole lighted side. This would mean you would see an increasing amount of the lighted side of the Moon.