Can someone help me with this question please?

Study 1 At the time, Wu's young son was starting first grade, and he worried about Taiwan's sky-high rates of myopia. Around 90 percent of teens there have it by the end of high school. Wu says the academic culture in Taiwan's primary schools didn't allow for much outdoor recess. "Many teachers want students to practice their homework during recess," he says. But Wu convinced his son's elementary school to increase outdoor time. He also recruited a control school. A year later, his son's school had half as many new myopia cases as the other school. "We saw the results - they were very successful," Wu says. Study 2 He did more research, at more schools, and eventually convinced Taiwan's Ministry of Education to encourage all primary schools to send students out doors for at least 2 hours a day, every day. The program launched in September 2010. And after decades of trending upward, the rate of myopia among Taiwan's elementary school students began falling - from an all-time high of 50% in 2011 down to 45.1% by 2015. 50.00 49.10 5001 4936 4786 4811 47,05 46.12 & 8 o % 30.00 - Pre-outdoor period ' Post-outdoor period Gaze into the distance * Tian Tian Outdoor 120 20.00 Eye exercise * Near work break 3010 Room light Table height 10.00 Near work break 3010 * Room light * Table height 0.00 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 Year