Nematodes may cause which of the following? Fertilization of soil

Leaves to turn yellow

Abundance of rain

Plants to pollinate

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

14,16 18 reacts with group

they are made of gases.

they have a spherical shape.

they make energy through fusion.