Which one of the following si base units is not matched to the correct unit of measurement?
a. length: km
b. mass: kg
c. time: s
d. temperature: k

A.    Length: km

The Si units of all the left measurements are true thus, in length the typical and standard SI unit is meter. SI units, also called as International Standard of Units, is composed of the following systematized units of physical measure which include, mole (amount of substance), candela (luminous intensity), kelvin (temperature), ampere (electric current), second (time), kilogram (mass), and meter (length). Hence, these measures spheres in multiplication or division by power of 10, increase or decrease in measure.  

The answer is a) taiga because taigas are cold

British cologoinst admisitrion