PLEASE HELPPP ILL GIVE BRAINLIEST Which meaning of the word element is used in the sentence below?

Iron is an important element. It is found in the food we eat, and it is used
to make many things, like buildings and bridges.

CHOICES:

GLOSSARY-a chemical
substance made
of only one kind
of atom

DICTIONARY- base, member, part, section

THESAURUS- a comfortable
environment or
habitat for a
person or
animal