Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to build a natural looking waterfall with a filtrific vanishing water system [title] Determine the path of the water feature. [step] When mapping out the path of your water feature, consider bends in the stream and waterfall drops. A natural looking stream channel should appear " ageless, " as if it has always been there.

Ending1: [title] Figure out how thick the waterfall is. [step] Decide if it is a horizontal waterfall or an uphill stream, as natural looking streams typically come apart easier. Ending2: This opens up the drop space for the waterfall. [substeps] Your waterfall should look like a river channel with a naturally flowing stream, and be easily identified from sight. Ending3: [title] Determine where the current is pulling you. [step] By determining how the current will drag you, you determine how likely you are to build your waterfall. Ending4: To best accomplish this, choose a location with a slope. If you don't have much of a slope to work with, as an alternative you can choose to create water flowing from a boulder or rock grouping.

Answer format: ending1/ending2/ending3/ending4