Uncountable
Labor can be both countable and uncountable. When referring to work in general, it is uncountable (e.g. "She is dedicated to her work"). However, when referring to specific instances of work or workers, it is countable (e.g. "There are five employees providing labor in the factory").
"Voice" can be both a countable and uncountable noun. When referring to the sound produced by speaking or singing, it is uncountable (e.g. "His voice is beautiful"). However, when referring to separate individual sounds or styles of speaking, it can be countable (e.g. "She has a soothing voice").
Yes, "stimulus" can be both a countable and uncountable noun. For example, "The government provided several stimuli to boost the economy" (countable) and "Increased spending acted as a stimulus for economic growth" (uncountable).
"Paragraph" is a countable noun because it refers to a distinct unit of text in writing. You can have one paragraph, two paragraphs, three paragraphs, etc.
Transport is both countable and uncountable as a noun.
countable
Uncountable
uncountable
"Paragraph" is a countable noun because it refers to a distinct unit of text in writing. You can have one paragraph, two paragraphs, three paragraphs, etc.
uncountable
Uncountable
The gerund painting is a countable noun, as in "There are 12 paintings in this room."
Countable
few is countable
countable
The noun 'steel' is an uncountable (mass) noun, a word for a substance.