Answer :
Answer:
d) lead pipe
Explanation:
An element -
It is a substance , which have exactly same atoms , is referred to as an element.
Element is the most simplest form of any substance and hence , can not be further broken down into simpler form by any chemical reaction.
All the elements known are all placed in a synchronized manner in the periodic table.
Hence, from the question,
Lead pipe is an example of an element , as it is composed only one lead elements , rest other like , baking soda , air , noodle soap , all are the that are mainly composed of the mixture of many atoms.