It is a subdivision of geology - hydrology. It has already been assigned it the geology category of WikiAswers.
Hydrology
A category prototype is a member of a category which describes the category best. For example, robins are prototypical birds (i.e. robins are prototypes of the category 'birds'). Of course, this greatly depends on perception and cultural knowledge.
Sand.
broad category
Broad category. Apex (:
Sandstone! Other good aquifiers are conglomerate, bodies of sand and gravel, well jointed limestone, etc.
Standing Surface Water
moving surface water
Standing surace water
A category prototype is a member of a category which describes the category best. For example, robins are prototypical birds (i.e. robins are prototypes of the category 'birds'). Of course, this greatly depends on perception and cultural knowledge.
Sand.
all of these A CORPORATION A HOSPITAL A PRISONER
Biological attack and Chemical attack.
sand
Some illnesses affect many body systems so they are harder to categorize. Usually, there is a single category that works the best. An example is Lupus that can affect any part of your body. It gets put into the autoimmune category.
There are over 6000 categories, and who knows how many questions in each category. So someone would have to choose your category and then know or research the answer. Sometimes you get a quick answer, sometimes not. It helps if you put your question in the best category it would fall under, like this one. I hope this was helpful.
Craig David won four mobo awards: in 2000 in category Best Newcomer, in category Best UK Single for "Fill Me In" and category Best R&B Act for "Fill Me In" and again in 2001 in category Best UK Act.
How do you choose the best woman or the best car?