Define the following

(a) Causeway

(b) Brackish

(c) Meander

(d) Contours

(a) Causeway — It is a raised road or platform across a minor stream that is motorable during dry season.

(b) Brackish — The well whose water is unfit for drinking and cultivation as it is salty is said to be brackish.

(c) Meander — It is a bend in the river flowing through a plain. Its presence indicates a flat land.

(d) Contours — These are lines shown in brown, joining places of equal height above the sea level.