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Answer: Classical conditioning
Explanation:
Classical conditioning is defined as the learning mechanism in which pairing of two stimulus is done.A strong stimulus is combined with previously objective stimulus to make a relationship between them.
According to the question , crying of Brandon while seeing popping or bursting of balloon is the learned mechanism through classical conditioning .
The West African city that became an economic center of trade due to regional commerce is Timbuktu.'
<h3>How did
Timbuktu become a regional center of commerce in West Africa?</h3>
Timbuktu's strategic location at the confluence of desert and water made it an ideal trading center. It was absorbed by the Mali empire in the late 13th or early 14th century. By the 14th century, it was a thriving trans-Saharan gold and salt commerce center, as well as a center of Islamic culture.
The city's proximity to the Niger River encouraged trade between West Africa and Morocco in North Africa. By the early 1300s, Timbuktu had become the nexus of a variety of east-west and north-south commerce routes, and it quickly became the Mali Empire's primary commercial metropolis (albeit not it's capital).
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The majority of the students (76%) reported that they had always used contraceptive methods. The most commonly used contraceptive method was the condom (95.6%), followed by oral contraceptive pill (86.7%).
