Question

drag the missing word into place propelled transatlantic trade when sailing was the only option for sea travel. convections trade winds jet streams

Explanation:

Trade winds are steady winds that blow in certain regions. In the era when sailing was the main mode of sea travel, these winds were crucial for propelling ships across the Atlantic Ocean, facilitating transatlantic trade. Convections refer to the transfer of heat through the movement of fluids (liquids or gases), which is not directly related to propelling trade in this context. Jet streams are fast - flowing, narrow air currents in the atmosphere at high altitudes and are not relevant to sailing - based transatlantic trade.

Answer:

Trade winds