What are concave mirror
hlo friends knok knok

A concave mirror is a mirror that is curved inward in the middle.

Explanation:

Unlike, a flat mirror, concave mirrors can form real images that are projected out in front of the mirror at the place where the light focuses.

हैलो, आज आप कैसे हैं मुझे आशा है कि आपके लिए एक शानदार रात/दिन होगा! <3

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44

honeslty bro its the same thing