What practical value did astronomy offer to ancient civilizations? view available hint(s) what practical value did astronomy offer to ancient civilizations? it them keep track of time and seasons, and it was used by some cultures for navigation. it them find uses for ancient structures like stonehenge. it allowed them to predict eclipses with great accuracy. it them understand our cosmic origins.

Option: It helped them keep track of time and seasons, and it was used by some cultures for navigation.

Explanation:

Astronomy performed a meaningful role in the early civilization, also in the lives of the people in ancient society. The ancient people with the guidance of astronomy created calendars by analyzing the Sun, the Moon, and the stars. It also helped in keeping tracks of seasons for agriculture in temperate climates and time. Polynesians use cosmos in navigating seas and islands.    

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.