Choose the correct alternative for the given relation.
Perch : Fresh water : : ? : Salt water
Crocodile
Frog
Cod
Snake
A perch is a fresh water fish.
Similarly, a cod is a salt water fish.
Waves are related to air in the same way ripples are related to……..
Mattock : Dig : : Shovel : ?
Seismography : Earthquakes : : Taseometer : ?
Shrub : Prune
Foundation : Edifice : : Constitution : ?