The conquest of mexico by spanish best illustrates the geographic theme of?

Movement theme.

Explanation:

Hernan Cortés invaded Mexico in 1519 and conquered the  Aztec Empire as it was the primary colonization of Spanish in America.  The expedition of Mexico was a part of the Spanish colonization of the new worlds thus this can be represented as a moment in the geographic themes as it shows the spread and dispersal of the ideas, customs, people and culture and the material for the old to the new world and the creation of a colonial rule. Movement can also be seen in the expedition, travels an hr alliance that was formed by these invaders towards the newly occupied lands.

Answertropical depression;

Developed countries will see a decrease in natural resources, because their population will decrease.