I don't have the "Textures" in my inspector, i can't paint my terrain

Hello everyone I have a problem and i looked everywhere and nothing helped me so i ask the question, in every tutorial everyone have the “terrain texture paint” option (i say it like this because i don’t know how to say it) so, everyone have that :

BUT I have this :

So as you can see i don’t have this “Textures” any idea ? how can i paint ?? please help it’s driving me crazy =(