Describe this and that

What to describe there's no picture

This n that description

they are pronouns,n they are a part of grammer

This: used to identify a specific person or thing close at hand or being indicated or experienced.

That: used to identify a specific person or thing observed or heard by the speaker.

se

explanation:

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )