Which half-reaction correctly represents reduction?
OA) Ca2+ - Ca + 2e-
OB) Ca2+ + 2e-
Ca
O C)2 F- + 2e- - F2
OD) 2F- - F2 + 2e-

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:

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

i think its 100

i hope this !