All external influences and factors that affect the growth and development of living organisms is ___________.

The statistical study of human population is ___________.

Gradual increase of the earth's temperature by the Green house gases in the atmosphere is called ________.

What is 'black death'?

What is Green House effect?

Birth rate and Death Rate

Rural settlement and urban settlement

Assertion(A): Ozone layer in the stratosphere is considered as a protective shield.
Reason(R): It prevents the UV radiation from reaching the earth’s surface.
a) A and R are correct and A explains R
b) A and R are correct, but A does not explain R
c) A is incorrect but R is correct
d) Both A and R are incorrect

Assertion(A): In tertiary activities, instead of producing goods by themselves, they are in the process of production.
Reason(R): People in Tertiary activities are purely eco friendly.
a) Both A and R are incorrect
b) A and R are correct but A does not explain R
c) A is correct and R is incorrect
d) A and R are correct and A explains R

Describe the patterns of rural settlement with neat diagrams.