What do you call a piece of historical information from a person who was actually at an event

What happens after a star goes supernova? just wondering! [tex]supernova [/tex] answer asap i really wanna know!

Atoy manufacturing company currently produces 100 toys each day. the workers at that company earn $15 per hour. however, the government establishes a minimum wage of $24 per hour. the company cannot afford to keep all its workers, so it lays off some employees. how many people lose their jobs? a. 14 b. 18 c. 23 d. 41

The quiver tree grows in southern africa. which of the following plant adaptations is likely to prevent these trees from dying out due to rising desert temperatures? releasing a black powder onto their trunk to absorb more heat from sunlight shifting their growing range towards the equator ability to store water in leafy structures to prevent excess evaporation limiting seed dispersal to nearby locations