There are many things that can affect ocean currents. Particularly wind. Changes in temperature with air currents and tides affect it as well.
It’s either carbon or hydrogen but I would definitely go with hydrogen
Similarities:
They contain nematocyst (cells that sting)
some are sessil/free swimming
Some corals have a symbiotic relationship with algae, they need to grow in shallow waters so that light can penetrate for the algae to photosynthesize.
Answer:
A human heart is roughly the size of a large fist.
Explanation:
but the size varies according to an individual's age, health and size. The heart weighs 7 to 15 ounces.