George E. Cawthon wrote
Electro-magnetism is one force, another is
gravity. Here is your question, name two other
natural forces!

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You appear to be the smartest person here.
Could you get us started by enumerating the
"unnatural forces" before we start listing the
"natural forces"?

Obviously you are too bright and too smug to
make a 9th grader's mistake of referring to the
4 fundemental forces as "natural forces."

All forces are natural. But it is commonly believe
(thanks to Uncle Albert) that all forces are derived
from 4 fundemental forces. Proving it was one of
Einsteins great unfinished works.