<span>planning of cities jewelry pottery Sanskrit religious art temples paintings sculptures stories plays poetry metal lurgy-the art of working with metal knew how to make alloysHindu-Arabic Numerals (still in use today)medicine inoculation-putting a small dose of a virus into someone to build a defense to disease <span>astronomy</span></span>
There are four main types of unemployment in an economy—frictional, structural, cyclical, and seasonal—and each has a different cause. Frictional unemployment. Frictional unemployment is caused by temporary transitions in workers' lives, such as when a worker moves to a new city and has to find a new job.