Question

1. lines running parallel to the equator

(r,e,d,q,n) 8. help users determine their exact position with the use of satellites

Explanation:

To solve this, we analyze the description: "Help users determine their exact position with the use of satellites" refers to a technology like GPS (Global Positioning System). In the context of disciplines, this relates to Geography (a subfield of Natural Science) as it involves location and spatial positioning. But since we need to match with the given options (though the options' full text isn't clear, the key here is identifying the concept). The process of using satellites for position determination is related to Geographic Information Systems (GIS) or GPS, which falls under Geography.

The description is about satellite - based positioning (like GPS), which is a concept in Geography (Natural Science subfield) as it deals with location and spatial navigation.

Answer:

(Assuming the correct option related to GPS/geographic positioning, e.g., if the options include a term like "GPS" or "Geographic Positioning" or a related abbreviation, the answer would be that option. Since the options are partially visible, but from the context, the key is recognizing the satellite - based positioning concept related to Geography.)