What is true about most higher-grade metallic ores?(1 point)
Responses
They are usually found deep below Earth’s surface—more than 1,000 ft underground.
They are usually found deep below Earth’s surface—more than 1,000 ft underground.
They are usually found very close to Earth’s surface—less than 1,000 ft underground.
They are usually found very close to Earth’s surface—less than 1,000 ft underground.
Most of them can be extracted using the placer method.
Most of them can be extracted using the placer method.
Most of them can be extracted without requiring drilling.
Most of them can be extracted without requiring drilling.