Question

which invention changed how portraits were created?\
camera\
keyboard\
furnace\
watch

Explanation:

Before the camera, portraits were mainly created through painting. The camera's invention allowed for a more immediate and realistic way to capture a person's likeness, changing the portrait - creation process. Keyboards are for inputting text, furnaces are for heating or industrial processes, and watches are for telling time. None of these have a direct impact on portrait creation like the camera does.

Answer:

camera