Usually no article before words like bus, car, train etc.
Because better gives consonant sound.
My father goes for a walk every morning.
A/An + verb = noun.
Ranks of service officers are granted by the president of Pakistan.
Usually the is used before a mountain.
The is an article here.
We spent our holidays in the mountains.
He is the most intelligent student of this class.
We use article the for superlative degrees of Adjectives.
Generally article the is used before superlative degree of an Adjective.
Usually no article required before, heaven, hell, God, parliament etc.
Usually Article the is used before unique things like Sun, Earth, Moon etc.
No article required