Why was control of the gulf of mexico important to spain?

What would lead a historian to consider two events to have a relationship of correlation rather than causation?

6. how did trade with the venetians contribute to the fall of the byzantine empire?

What explains the increase in life expectancy in botswana? a. the increased availability of jobs and an improved economy b. access to antiretroviral drugs, hiv/aids education, and widespread hiv/aids testing c. a series of military takeovers that stabilized the political system and led to education reform and increased literacy rates d. a recent military coup that led to an improved healthcare system select the best answer from the choices provided.