Both. The use of the word paper for the substance on which you for example write, draw, or to wrap things is uncountable. Units of paper are expressed as sheets of paper, rolls of paper, stacks of paper, etc.
The use of the word to describe an intellectual piece of work is countable.
Transport is both countable and uncountable as a noun.
The noun 'steel' is an uncountable (mass) noun, a word for a substance.
Countable
The noun 'animal' is a countable noun. The plural form is animals.
Prawn - prawns is the plural - is a countable noun
Transport is both countable and uncountable as a noun.
The noun 'steel' is an uncountable (mass) noun, a word for a substance.
The term 'paper sheet' is a countable noun. The plural form is paper sheets.example: Nine paper sheets were attached to form one giant sheet.
Shark is a countable noun.
countable
Countable
The noun 'daytime' is an uncountable noun.
The noun 'animal' is a countable noun. The plural form is animals.
Prawn - prawns is the plural - is a countable noun
Pasta is a countable noun
Countable
The word 'violence' is an uncountable noun.