Earth's crust is made of rock, and rock is made of natural substances called minerals. There are three main types of rock: sedimentary, igneous, and metamorphic rock. Each type is produced in different ways. The oldest rocks on Earth were formed about 3.8 billion years ago.
0.25mm is the absolute size
A group of tissue that work together is a organ
The answer is A because you think that’s the answer and you should go with you mind