Question

which of the following describes why
metals are
essential to humans?
a. These
are used in purification of water
b.these are used to make machinery and automobiles
c.These are major components of
fertilizers for plants to grow
d.These form gases in the atmosphere
that are required by humans to breathe
d​

Answer 1

Explanation:

b. this are used to make machinery and automobiles...

but metal is also used in all fields as well such as nitrogen in food packaging, ammonia in fertilisers etc.. as we are co related to metal in our daily life..

Answer 2

Answer:

these are used to make machinery and automobiles

Explanation: