Question

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

Answer 1

Answer:

(b) They are used to make machinery and automobiles.

Answer 2

Answer:

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..