Final answer:
The Cuvier's Gazelle is found in grasslands and semi-arid regions, where they have access to their preferred vegetation for grazing.
Step-by-step explanation:
The domain of a Cuvier's Gazelle primarily encompasses grasslands and semi-arid regions, rather than rainforests, arctic tundra, or deserts. The correct answer to the question is b) Grasslands and semi-arid regions. Cuvier's Gazelle is adapted to habitats where shrubs and grasses are available for grazing. This excludes environments with extreme conditions such as the arctic tundra which has extremely low temperatures and limited plant growth. Deserts, although semi-arid, are also generally not suitable for Cuvier's Gazelle due to their extreme lack of water and sparsity of vegetation.