True or false: scientists develop ideas and prove some of them to be true:

True.

Explanation:

The word scientist is a general term used to describe someone who researches and examines various aspects of the physical world to gain a better understanding of how things work. This research comes through an idea on a particular subject that scientists will develop to conclude whether the idea is true or not.

There are many "scientist" specializations, and depending on the field of study one chooses to pursue, work may vary greatly. Each scientist, however, follows “the scientific method,” which is a strict set of rules that ensures all new discoveries are factual, not just speculation.

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.