Indicate whether the specified cause is a necessary condition, a sufficient conditions, a necessary and sufficient condition, or neither a necessary nor sufficient condition for the following statement: "A single shot caused the first world war"

tip: for a sufficient condition-- ask yourself, does this cause GUARENTEE the effect? For a necessary condition- ask yourself- is this effect happen without the cause, or is the cause necessary for the effect?

A necessary condition

A sufficient condition

a necessary and sufficient condition

netiher a necessary nor sufficient condition

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.