Deciding where agriculture is produced and what products are cultivated is most dependent on
a. climate
b. proximity to water sources
c. the availability of technology
d. the economic conditions of the market

a. climate

A climate is an important environmental factor necessary for agricultural  production. Climatic factor includes amount of rainfall received by the crop field, favorable summer and winter season temperature which can be suitable for growth, tolerance and adaptations by plants. Inappropriate temperature range of climate can destroy the cultivation whereas, suitable climatic conditions can increase the agricultural yield.

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.