Primary sources are produced by someone who took part in the event or by a witness to an event.
Secondary sources are sources produced by someone who did not take part in or witness an event.
Primary sources are the raw materials of historical research - they are the documents or artifacts closest to the topic of investigation. ... Secondary sources are not evidence, but rather commentary on and discussion of evidence
B) iron ore
C) petroleum
D) arable land
Answer:
i doubt it
Explanation:
Underdevelopment of technology in some countries and deforestation that causes sediment to reduces water flow are conditions affect hydroelectric power in Southern Africa
An hydroelectric power is a power derived from the potential energy of water motion.
Hence, the condition that affected the sector includes underdevelopment of technology and deforestation
Therefore, the Option A and C is correct.
Read more about hydroelectric
Answer:
Which conditions affect hydroelectric power in Southern Africa?
A. It is underdeveloped in some countries
B. There are not enough rivers to make it worthwhile.
C. Deforestation causes sediment, which reduces water flow.
D. River water levels are too low during the dry season to generate power.
ANSWERS: A and C
Explanation: just took the quiz