Ocrasueecn spewn 0:53:18 (HIST) The consequences of the Mongol conquest of ancient Russian lands include Bbibepure opuH orger: a slowdown in the development of the economy, culture and science, and a decrease in the population The Mongol conquest did not affect the development of the ancient Russian lands The Mongol conquest completely destroyed the achievements of ancient culture the rise of craft economic and cultural development

The correct answer is: a slowdown in the development of the economy, culture and science, and a decrease in the population.<br /><br />The Mongol conquest of ancient Russian lands had a significant impact on the region's development. The Mongols imposed heavy tributes and taxes on the Russian principalities, which led to a slowdown in economic and cultural development. Additionally, the Mongol rule resulted in a decrease in population due to wars, famines, and diseases. The Mongol conquest did not completely destroy the achievements of ancient culture, but it did hinder their progress and growth.