Currents shape rivers over long periods of time.
Please select the best answer from the choices provided
OT
OF

1. dermis

2. chemical

3. urine

4. viruses

5. antibodies

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

the correct option is option d