Answer:
I, II, and IV
Explanation:
"Race" is not an answer as it means "Ethnicity".
Ethnicity can be simply described as a person's identification in related to a certain group of peoples with a certain value system, culture and language.
In this case, all, the speaking language, cultural traditions and the shared common history identifies one group of people from another.
They really help in the process of Africa's state building, creating commercial networks between parts of the continent, and introducing literacy ( especially on northern part of Africa)
They also controlled the sea route between Asia and Africa and managed to maintain the relationship between Africa and the middle east
The geographic use of technology to view and record observations from a distance is known as remote sensing.
It replaces slower, steeply-priced statistics series at the ground, presenting rapid and repetitive coverage of extraordinarily huge areas for everyday programs, ranging from weather forecasts to reviews on herbal failures or climate change.
Remote sensing is the manner of detecting and tracking the physical characteristics of a place by using measuring its meditated and emitted radiation at a distance (commonly from a satellite or plane). special cameras gather remotely sensed photographs, which help researchers "experience" matters approximately the Earth.
Examples of passive far-flung sensors consist of film pictures, infrared, charge-coupled gadgets, and radiometers. active series, on the other hand, emits energy in order to experiment with objects and areas whereupon a sensor then detects and measures the radiation that is meditated or backscattered from the goal.
Learn more about remote sensing here:brainly.com/question/17482555
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A-through an optimistic viewpoint.
