Which one is correct?Is tall only used for humans?And should mountain be plural or singular?
The highest mountain
The tallest mountain
Or, is there other ways to ask for the height of the mountain
highest mountain is correct
you can also use 'high' for buildings
mountain can be both in singular and plural
-it's the highest mountain in the country
-it's one of the highest mountains in the country
High is applied chiefly to things which rise from a base or foundation or are placed at a conspicuous height above a lower level [a high hill; a high ceiling]
Tall applies to what grows or rises high by comparison with others of its kind [Tall tree; tall building; tall plant]