According to other sources, these are the options that come with this question:
conquistadores
settlers
scientists
missionaries
Out of these options, the people that did not come from Spain to Latin America were scientists. Conquistadores came in order to "conquer" the Native people of America and take the land and resources for the Spanish Crown. Settlers came to make America their home. Missionaries came with the purpose of bringing Christianity to the Native people. Scientists, however, did not move from Spain to Latin America.
B) esta. esta typically refers to describing something like location whereas es describes the person's attributes. (ie, esta would be used with "she is in the store" and es would be used with "she is cute"
