What type of line connects the north and south poles?
a. longitudinal
c. equatorial
b. latitudinal
d. tropical

A. longitudinal
Longitudes are the north-south, latitudes go east-west. You can remember this easily by imagining the Earth as a large person with their head on the north pole - the measurement from top to bottom is how long the person is (LONGitude), the measurement around the waist is how fat the person is (fat rhymes with LAT, so latitude).

Answer decreased soil salinity;