This is the 5018th most frequent French word.
terrestre
Relating to the earth or land; earthly.
In this sentence, 'terrestres' is an adjective modifying 'animaux', meaning 'land' or 'earthly', referring to animals that live on land rather than in water or air.
Les animaux terrestres vivent principalement sur la terre ferme.
Land animals primarily live on solid ground.
Here, 'terrestre' is used as an adjective for 'vie', describing it as terrestrial, which pertains to life on Earth or land-based life.
La vie terrestre est influencée par les conditions environnementales.
Terrestrial life is influenced by environmental conditions.
In this instance, 'terrestre' modifies 'écosystème', emphasizing that the ecosystem referred to is land-based as opposed to aquatic or aerial.