What is the greatest carbon reservoir? A:geosphear
B:hydrophear
C:atmosphere
D:biosphear

B: hydrosphere

Actions for the conservation of species and populations that develop outside the natural environment constitute the so-called ex situ conservation. In situ conservation is a concept that refers to the protection, defense and safeguarding, within the natural habitat itself, of a species - be it animal or plant - that is under threat of extinction.

Explanation:

Ex situ conservation is a process in which a species is protected outside of the environment in which it inhabits. This type of conservation can be carried out by protecting living beings in zoos, hatcheries, aquariums and botanical gardens; or protecting their genetic material in tissue culture laboratories. In situ conservation (on the site) is carried out in the natural or domesticated habitat of the species and is based on the traditional management of agroecosystems as a primary part of conservation, that is, it is the maintenance of the biodiversity heritage within the framework of the dynamic evolutionary systems of the natural habitat, in their natural environment.