I would say b. precious stones Example of commodities that have been used as mediums of exchange include gold, silver, copper, salt, peppercorns, tea, large stones (such as Rai stones), decorated belts, shells, alcohol, cigarettes, cannabis, candy, cocoa beans, cowries and barley.
The correct answer should be climate.
Answer: Development as an excuse for imperialism.
Explanation:
Proponents of imperialism sought to justify their imperialist aspirations. Developed and powerful countries have always carried out imperialism over those who have not reached that development stage. Imperialism has always aimed to enrich itself at the expense of others. Yet to defend their aspirations, the imperialists have always pointed out that their main aim is to contribute to these underdeveloped countries' development. The construction of the infrastructure was a cover for that. Still, the real goal of constructing the infrastructure was to make it easier to transport exploited raw materials from third countries.