In the later years of the preoperational stage, children show an understanding that certain things stay the same, regardless of changes in shape, size, and appearance. This is called .

Conservation

Explanation:

Conservation is one of Piaget Cognitive Stages of Development. This happens around 2 to 7 years. This means that a substance will remain as it is inspite of it changing color or shape. For example, 30 ml of juice will still be the same amount even in a small cup or a large basin.

i tried the eyeshadow trick you told me about and it worked so good i i did a yellow going into orange colors and it was bright and you could see it on my eyes

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.