Question

Which of the following does not function is suspension feeding?

This makes no sense.

I am not sure what you are asking, since you did not indicate what is "following."

I searched Google under the key words "<I>suspension feeding</I>" to get these possible sources:

http://hypnea.botany.uwc.ac.za/marbot/kelp_beds/key_inhabitants/suspension_feeders.htm
(Broken Link Removed)
http://www.wildsingapore.com/chekjawa/text/i021.htm

I hope this helps. If not, respond to this post with more details as to what you are seeking. Thanks for asking.