1. "They are very sensitive to <b>everything that is going on in the water</b> around them."<br/><br/>Above is the original I would like ask which of the following has the exactly same meaning as the original?<br/><br/>2. "They are very sensitive to <b>everything that is happening in the water</b> around them."<br/><br/>3. "They are very sensitive to <b>everything that is occuring in the water</b> around them."<br/>Zoobooks Sharks.<br/><br/>Thank you.