What is the longest day of the year in the northern hemisphere?

June 21

Explanation:

June 21 is the longest day of the year for the Northern Hemisphere doesn't mean every location has its earliest sunrise or latest sunset on that day. If you live in Washington, DC, the latest sunsets will start on the day after the solstice, the 22nd.

c, this answer is productivity.

there's multiple reasons why the conquistadors were so successful in colonizing central america, and some of them are:

- they were seen as gods;

at the beginning, the spanish settlers were seen by the natives as gods, and this was mainly due to their white skin, and the way they came with their boats.

- possessed superior weaponry;

the spanish had gunpowder and guns, as well as cannons, while the natives did not had any fire weapons.

- made cleaver alliances;

they used the situation of tribes hating each other, so they made alliances with some of them which served them very well.

- brought diseases;

the native people were not immune to certain diseases the europeans brought with them, so they were dying from seeming harmless things for european standards.