<span>Sexual reproduction INCREASES variation and selective breeding DECREASES variation.
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Commercialisation led to growth of national agriculture and agricultural problem acquired national form. It brought about regional specialization of crops on an efficient basis. Commercialisation encouraged the production of some specific crop and favourably affected their distribution.
Answer:
The 1st one is the Volga River, 2nd Lake Baikal, 3rd Balitic sea and 4th Black sea
So what is this supposed to mean? Normally people post questions here but it looks like you posted answers lol.