Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to be careful around a campfire [title] Build the fire well away from other items. [step] Build about 10 feet (3.0 m) away from tents, trees, roots, overhanging boughs or dry leaves, and other flammable items. This is especially important if if there's no fire ring available.

Ending1: [substeps] Sweep away loose twigs, sticks, leaves or roots. Underground roots can catch on fire in dry conditions. Ending2: This makes it a lot harder to remove any flammable items later. [substeps] The easiest way to build a fire is to build it within a ditch or an existing mound. Ending3: Due to the high temperatures and slippery ground, it's best to build the fire outside or on a flat, safe surface. Don't let other people sit on the fire, as this could cause fires. Ending4: [title] Expose more flammable objects to put out. [step] Before you put in more flammable objects, you should remove some of them to fill out the fire ring.

Answer format: ending1/ending2/ending3/ending4