The Negro and Madeira Rivers feed into the Amazon.
Sources of water pollution in southern Europe are organic minerals in the water such as pesticides, chemicals, hydrocarbon, and petroleum.
Your answer is: Pesticides, chemicals, hydrocarbon, and petroleum.
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The Heart of Islam is on the Arabian Peninsula - which is in Asia, so this is not the correct answer.
Human species is believed to have evolved in Africa - and because of this it is often called "the cradle of civilization"- so the correct answer is d)
Human history begins with written texts - which are more associated with Asia.
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Answer:
Solar flares are massive explosions of energy in the Sun's atmosphere.
The new technique allows changes in the Sun's magnetic fields, which drive the initiation of solar flares, to be monitored up to ten times faster than previous methods.