which of these was an innovation that accompanied the advent of framing?

Question

a.herding
b .normadism
c. hunting
d. the use of metals

my answer D

Answer 1

Is that what your text materials say?

Answer 2

not really is confusing

Answer 3

picture framing?
Perhaps farming?

If farming, then:

herding is most often practiced by nomadic tribes who do not farm (cowboys?)

nomads do not usually farm

farmers may hunt, but only on vacation during deer season.

I suspect that to really develop the use of metals you need to settle down in one place where you can build forges and such. Then you can sell your metal objects to the nomadic cowboys.

Answer 4

Try this:

http://en.wikipedia.org/wiki/History_of_agriculture