Answer:
A
Explanation:
estuary is the tidal mouth of a large river, where the tide meets the stream.
It has gone through four half-lives of carbon-14 (5730 years<span> x 4 = </span>22920 years<span>)
It is 22920 years old.
Hope this helps!</span>
Slowly because air has a hard time to reach the magma because it is below the surface of the erth
<h3>I hope it's helpful for you ✌️✌️✌️✌️❤️✌️❤️</h3>