Cuando el ecosistema nesesira comenzar

The answer you are looking for is option d

Search it on google it will give u the exact answer am pretty sure

It's about -20°c to -15°c.

Six base units were recommended: the metre, kilogram,second, ampere, degree kelvin (later renamed kelvin), and candela. in 1960, the 11th  cgpm  named the system the international system of units, abbreviated si from the french name, le système international  d'unités.