It is a cool winter evening, and you are feelinga little chilled. To warm yourself up, you sipsome warm tea. As you swallow, you can feelthe tea warm your mouth and throat. This teais warming you up by the process of:

A. conduction.
B. convection.
C. radiation.
D. induction.

The tea is warming up us is because of process of convection.

Explanation:

The conduction is the process in which the heat transfers within the material like heating up metal rod.

The radiation can be defined transfer of energy from body in the form of particles or wave like radiation from nuclear bomb.

The convection is the process of heat transfer by the movement of warm gas or liquid in which warm air rise and cool air sink.

Here when tea when we swallow tea the motion of molecules in the tea rise and there is transfer of heat.

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle  

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide