The variety of coal in which the deposit contains recognizable traces of the original plant material is_______?

✅ A. 230

✅ D. To keep the Center of gravity always above vertically above the rope

✅ A. Zoology

✅ A. Concave lens

✅ A. Bromine

✅ D. Nuclear reactor

✅ D. Plasma

✅ D. Chip