Which substance is comprised of more than one element?
aluminum
helium
silver
steel

steel

Explanation:

use a periodic table

Steel. It's a metal made of mainly iron and carbon, as well as other metalloid elements.

its been noted for the past decade or so that there is some (approximately 5% to 7%) shrinkage in the brains of people who have schizophrenia, most notably in the gray matter, which is an important part structures in the brain’s amygdala, hippocampus and parahippocampus, which are all involved in memory storage and retrieval memory storage and retrieval.

explanation:

ive read articles