Question

how there are so little usable materials left to historians to use.

Answer 1

Answer:

There are little usable materials left for historians to use as either they are already used or have depleted over time. The sources of study are referred to as the firsthand testimony of the history topic to be studied. Generally, sources are of three types, primary, secondary and tertiary.

Explanation:

Answer 2

Answer:

There are little usable materials left for historians to use as either they are already used or have depleted over time. The sources of study are referred to as the firsthand testimony of the history topic to be studied. Generally, sources are of three types, primary, secondary and tertiary.

Explanation: