Diets vary around the world because it is such a big place with different cultures, produce, and livestock. Indigenous taste, agricultural economics, and earning have a great effect on what several individuals eat around the world.
There are other reasons that made diet vary,
a. Temperatures, Climate, rainfall, and weather differ.
b. Landscape, ground, and soil are different
c. Technology developed at different rates and periods.
d. The angle of the sun's reflection varies from place to place.
e. Ethnic differences
f. The design of commercial organization and trade are different.
g. Lakes, Oceans, and rivers vary
h. Source of income differs; several people eat depending on how much money they can afford.
Finally, almost everything causes the variance among the diet all over the world.