Answer:
The first one.
Explanation:
Before the Persian war the city-states had been fighting each other but they could not defeat Persia alone so, they united to defeat Persia.
Answer: human factors
Explanation: Human Factors as a discipline was Influenced by pilot errors that claimed so many lives during World War II, due to this errors that claimed many lives, engineers aimed to attempt to redesign instrument panels that was clear and easy to use for humans.
Human factors is a scientific aspect of psychology which concentrated on different topics, which includes workplace safety, human error, product design, human capability, with the goal of reducing human error and increasing general productivity.
Human factors is an area in psychology which focuses on human abilities and behavior in order to find the best ways to design products, equipment and systems for maximum safe, effective, satisfying use by humans.
The 365 day solar calendars are much more practical and accurate than 29.5 day moon calendars. As the lunar calendar is governed by the cycle of 29 and a half days of the moon, in ancient times it was much used for the resemblance to the menstrual period of the woman, and with the pregnancy time of 10 lunar months. However, it can't be compared to the accuracy of the solar calendar, which also brings together the four seasons of the year, and it was the most popular in the West since lunar cycles are inaccurates for modern requirements. This because each month would have half a day that would be lost or added to next month, but finally at the end of the year, the lunar cycles would not fit well with the human lunar calendar.
Answer: i think A.
Explanation: The islands of the Pacific have gradually been gaining independence: two countries in the 1960s including Western Samoa, six countries in the 1970s, and three countries in the 1980s. The most recent country to win independence is the Republic of Palau, which gained nationhood in 1994.
