What’s a substance made up of two or more elements

Compounds

Explanation:

Substance made up of two or more elements is known as Compounds

For Example :-

1.) Water

2H2 + O2 → 2H2O

2.)

Carbon Dioxide

C + O2 → CO2

-TheUnknownScientist

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms