The Three Economic Sectors. According to the three-sector theory, all economic activity can be classified into one of three sectors: the primary sector, the secondary sector and thetertiary sector.
Your best will be "C" solar heating near the costline heats.....
I think it's B but I'm not to sure. hope that at least kinda helps.
Sorry dude..
I don't know from where u got this question but I wasn't able to get the answer from nowhere..!!
hmm..
