Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to block wind while camping [title] Select sheltered campsites. [step] If high winds are in the forecast, pick campsites that offer shelter, if possible. Avoid wide-open spaces.

Ending1: [title] Indicate if you will be camping on dry ground. [step] A sandy surface will not give adequate shelter. Ending2: Don't set or construct large camps. Keep a check on the wind as every little wind chill can compromise your chosen campsite. Ending3: And don't expect the wind to blow away materials either. [title] Turn off the lights to conserve power. Ending4: Better selections include : [substeps] Groves of trees. The trunks of trees will help break the wind naturally.

Answer format: ending1/ending2/ending3/ending4