Arachne is a weaver that boasts she is the best weaver in the universe and that no one can match her skills. This comes back to bite her later when she is put in a cloth making competition with Athena. Arachne, of course, loses and is turned into a spider.
Arachne's characterization foreshadows her fate by her being boastful.
I say letter c is the answer
It helps in understanding which crop should be cultivated on a particular land.
It also helps in gaining information about how agriculture can be done in poorer soils.
It gives information about the nutrient quality of the soil.
This avoids wastage of capital on the cultivation of unsuitable crops.
It also helps in controlling pests and insects.
Are you sure you aren’t missing another character, because I’m pretty sure that’s not a word. It could possibly be a name but I’ve even check my Japanese dictionary and nothing came up for “kataka”