They are mid-ocean ridges<span>, which </span>form<span> where two tectonic plates are spreading apart, which is called seafloor spreading. Tectonic plates are large pieces of the earth's crust, and they interact in a number of ways. Where they pull apart is called a divergent plate boundary.</span>
Answer:
Correct answer is D. Tourism
Explanation:
Only option D is correct because most of the islands in Oceania are rather small, and therefore it is impossible to develop any of the mentioned industries, except tourism. Due to beautiful beaches, awesome climate tourism is the major developing force of this area.
The tributary increases or adds to the amount of water flowing through a river.