It is uncountable.
Can you have 3 food? No.
The best way to check is to compare it to money and dollars.
Money is uncountable and dollars is countable.
I can have 3 dollars, but not 3 money.
Transport is both countable and uncountable as a noun.
countable
uncountable
uncountable
Uncountable
The gerund painting is a countable noun, as in "There are 12 paintings in this room."
"Pizza" can be both a countable and uncountable noun, depending on the context. When referring to whole pizzas, it is countable (e.g., "I ordered three pizzas"). However, when referring to pizza in a general sense or as a type of food, it can be uncountable (e.g., "I love pizza").
countable
few is countable
Countable
The noun 'steel' is an uncountable (mass) noun, a word for a substance.
he asked me if the word fire wood countable or uncountable?