70% of the earth is covered in water.
The answer is D.
Farming on a fragile ecosystem will deprive resources. Slash and burn farming does the same. Large scale cattle farming does too much harm. Composting helps reuse the environments resources.
The axial tilt is defined as the angle between the direction of the positive pole and the normal to the orbital plane. The angles for Earth, Uranus and Venus are approximately 23°, 97°, and 177° respectively.
Hope this helps:)