which best describes what is made of matter?\nall living things and objects\nall atoms\nall solid objects…

Brief Explanations:

Matter is anything that has mass and takes up space. All atoms are made of matter. Living things and solid objects are also made of atoms, so they are made of matter. But the most fundamental unit here is atoms. All substances are composed of atoms, whether they are living things, solid objects or others.

Answer:

all atoms