The longest river in the world is the river.
a. indus
b. nile
c. mississippi
d. missouri

The longest river in the world is the Nile river.

Option B

Explanation:

Africa encompasses the river Nile with its water resources shared across 11 countries. A variety of old age Egyptians has raised its civilization where the Nile formed their main source of irrigation and freshwater.

Although Egypt and Sudan have many secondary sources of water, Nile serves as a primary source for them for agricultural and daily purposes. White Nile forms the primary stream of the Nile river with North East civilizations that were developed with the close existence of the Nile river.

a maximum–minimum thermometer. the scales are fahrenheit on the inside of the u and celsius on the outside. the current temperature is 23 degrees celsius, the maximum recorded is 25, and the minimum is 15, both read from the base of the small markers in each arm of the u tube. the bulbs are hidden by a plastic housing.

six's thermometer is a registering thermometer which can record the maximum and minimum temperatures reached over a period of time, for example 24 hours. it is used to record the extremes of temperature at a location, for instance in meteorology and horticulture. it was invented by a british scientist james six, born in canterbury, in 1780; [1] the same basic design remains in use.

it is also commonly known as a maximum–minimum, minimum–maximum, maxima–minima or minima–maxima thermometer, of which it is the earliest practical design.

the thermometer indicates the current temperature, and the highest and lowest temperatures since last reset.