School closures are an incendiary issue in nearly every corner of California, as enrollment declines and expenses climb. The topic has sparked parent revolts, teacher strikes and school boards’ desperate attempts to keep districts financially afloat. And then there’s Orick. The picturesque town in northern Humboldt County has a historic school with five classrooms, a gym, a vegetable garden and an expansive play field. Its current enrollment: nine. Its expenses: $118,000 per student per year,