What islands did darwin visit while traveling on the beagle that were the most important in terms of observing animals?

Galapagos Islands is the correct answer.

Explanation:

Charles Darwin was an English naturalist and biologist. He is one of the main theorists of evolution. By observing animals, Darwin developed the natural selection theory, which refers to the different phenotypes of individuals are affected by different conditions and help them survive. The Galapagos Islands played an essential role in this investigation, where Darwin found mockingbirds that shared some characteristics but they were different island to island.

the correct answer is modern american cars are not available due to trade restrictions.

trade between cuba and the united states have serious restrictions. the u.s. imposed an economic embargo on cuba, that among other things means that modern american cars are not available due to trade restrictions.

in response to some governmental actions of the authorities from cuba, president john f. kennedy proclaimed an embargo on trade between both countries in february 1962. the trade embargo remains active until this day and was implemented directly by the departments of commerce and the department of treasury.

in president trump’s administration, there is a national security presidential memorandum that "strengthens the policy of the u. s.", affecting trade with cuba.