Fill in the blanks:
Inclusion of unwanted and harmful substances in the soil is called............. .

Fill in the blanks: The plants which depend on the food produced by other plants are called................ .

Fill in the blanks: The process of obtaining and utilization of food by an organism is called.............. .

Fill in the blanks The process of changing a substance from gaseous state to liquid state is called_______.

Fill in the blanks : Flowers which do not open are called …….

Fill in the blanks with suitable word Unwanted sound is called ________

Unwanted sound is called …………….