Write a few paragraph on the development of time keeping device? can any one help me?

The first devices used for measuring the position of the Sun were shadow clocks, which later developed into the sundial. ... 3500 BC, are among the earliest shadow clocks. The oldest of all known sundials dates back to c. 1500 BC (during the 19th Dynasty), and was discovered in the Valley of the Kings in 2013.

The most famous mechanical clock was designed and built by Henry de Vick in c. 1360—for the next 300 years, all the improvements in timekeeping were essentially developments based on it. The invention of the mainspring in the early 15th century allowed small clocks to be built for the first time.

Explanation;Timekeeping is the process of tracking and reporting work and leave time. Everyone is responsible for accurate timekeeping: Employees report leave and approve their time on their timecards.

teenagers are certainly stereotyped as moody.

most people view teenagers as naturally moody and grumpy, even when this is wrong. many teens are suffering from depression but it is brushed off as "just a phase" or "that's just cause they're a teenager"

he agrees with the monk's positions.