What is tenebrism?
a. the three dimensional effect light creates
b. a style of painting using sharp contrasts of light and dark
c. the shadows created by the artist
d. none of the above

b. a style of painting using sharp contrasts of light and dark

Explanation:

The word tenebrism had its origin from the Italian word ' tenebroso'. Tenebroso when translated to English language means dark and gloomy.

Tenebrism was developed in the 17th century by Spanish and Italian artists led by Caravaggio.

It is attributed by its dominant used of dark tones and shadows with dramatically contrasting effects of light

So in arts, we can define tenebrism as a style of painting where violent contrasts of light and dark are used, and at the long run the darkness becomes a dominating feature of the image.

i think it's but if you get it wrong its not my fault : )