Lac is produced by insect________?

The contour of equal water heads and pressure in the soil mass beneath retaining structure are called________?

The fruit and vegetables contain an insoluble stiffening material called________?

Azolla which fixes nitrogen in rice field is________?

Activities of central bank designed to influence financial variables such as money supply and interest rates?

A dam which is prevented from overturning by the action of lateral or vertical up thrust of water by its weight is called ________?