The 3 and 2 to the right of the components are subscriptions.
When two element combine to form more than one compound i hope this helps you with work have a nice day :)
The two elements that produce background radiation on earth are Radon and Uranium. Airborne radon can decay on its own. Radon undergoes alpha decay to produce Polonium. Uranium naturally undergoes alpha decay to produce Thorium.
Answer:
D my guy
Explanation:
I have a hunch if its biotechnology involved with plants selective breeding seems most appropriate
