Answer:
a)what is humus?
ans-the dead and decayed parts of plants and animals are called humus..
b)explain about plate tectonic theory.
ans- The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.
<span>It is bordered by five countries: Gabon and the Atlantic Ocean to the west; Cameroon to the northwest; the Central African Republic to the northeast; the Democratic Republic of the Congo to the east and south; and the Angolan exclave of Cabinda to the southwest.</span>
D support the passage of import duties on manufactured goods
The answer is C. the elevation difference between two adjacent contour lines.