The best definition for agricultural hearths is the places where agriculture developed independently all over the world. Hence, Option D is correct.
A place where the birth of a crop takes place or the place where a crop originated, that place is considered the agricultural hearth. This agricultural Hearth is not about any particular place. It is spread all over the world. Whether it is Latin America, South Asia, East Asia, or anywhere in the world. Each region in the world had contributed to the agricultural hearth.
From these places, crops get spread all over the world with the help of globalization. The major factors that cause the agricultural hearth are rivers, climate, soil, and many more. All these come in geographical regions that vary from country to country. Some examples of the agricultural hearth are: crops like Maize, cotton, potatoes, and lima bean have their hearth in Latin America, crops like Lentil, olive, rye, and barley are from Southwest Asia, and many more.
Therefore, Option D is correct.
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