Which is an example of diffusion?

a. native american foods were taken to europe to feed people and livestock.

s. chinese men forced women to undergo foot binding.

d. europeans captured and enslaved africans.

f. communist governments limited outside contact with free societies.

Statement A - "Native American foods" were taken to "Europe" to feed "people and livestock" is an example of diffusion.

Explanation:

The literal meaning of the word 'diffusion' is spreading of "something" more widely.  When the Europeans took back with them native American foods, diffusion of ideas took place between the native Americans and the Europeans in the form of exchange of recipes of staple foods. In this way, ideas kept spreading beyond the seas and 'diffusion' occurred

What exactly do you mean