What was the effect of discovery of quinine in the 1820s? It gave Europeans a tool to treat illness in tropical areas, and then be able to colonize those areas.
It forced European nations to expand their armies and navies.
It promoted industrialization in smaller countries across Europe.
It led to European advancements in astronomy and physics.

The discovery reveal tool used to treat illness in tropical areas.

The Quinine is a compound extracted from bark of tree and was discovered in French researchers Pierre Joseph Pelletier and Joseph Bienaimé Caventou in 1820.

In conclusion, the discovery gave Europeans tool to treat illness and enable to colonizization of those areas.

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Option: It gave Europeans a tool to treat illness in tropical areas, and then be able to colonize those areas.

Explanation:

The European in the 19th century faced a problem during their colonization in the tropical region. The problem was malaria that changing the tropical region. As Europeans established colonies in the tropicals, they faced a threat from a mosquito-borne disease which killed many European. The treatment of malaria in the form of quinine became a vital medicine for the European quest to conquer and rule faraway lands during the nineteenth century. The use of quinine allowed small European communities to survive and flourish in tropical regions.

explanation:

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