cho tứ giác abcd có 2 đường chéo vuông góc với nhau gọi e, f,g, h là các trung điểm của ab, bc, cd, da cmtuws giác efgh là hình chữ nhật

Based off the appearance of the peppered moth, its markings would not be advantageous in a lush green ecosystem . this could cause their population to decrease as the camouflage factor would be somewhat useless and make them much more vulnerable to predators .hope this : )

Bewhrfwegfbhfbrubgrgrw rgwr

Sorry this isn’t really an answer i just need to answer two questions. i hope that you find the answer that your looking for though