Answer:
The main reason there are no big cities is due to natural resources to support them, mainly water. Most comes from underground as there are no lakes or big rivers that run through that part of the country with a constant flow to support large populations. Its a great place to live and visit.
Answer:
D. introduce new predators to an environment
Answer:
The Earth has different compositional and mechanical layers. Compositional layers are determined by their components, while mechanical layers are determined by their physical properties. The outermost solid layer of a rocky planet or natural satellite. ... The Earth has an outer core (liquid) and an inner core (solid).
Explanation:
The answer is B. subsistence economies
A = πr²
r = 3π
A = π(3π)² = 9π².π = 9π³ ≈ 279.05649
