Please choose the correct ending to complete the given sentence: Work World: [header] How to feed bees [title] Pick a frame feeder. [step] This is the most common feeder to use. These can be wood or plastic.

Ending1: You want to pick a feeder in the 1-2 gallon range. Some models come with coarse siding to let the bees climb along the sides. Ending2: Feeders that are also water-based are best because they are lightweight enough to keep the bees' food from sloshing around, and they are also easier to handle. [substeps] Some beekeeping stores and online sellers are also specializing in making walnut feeders. Ending3: Plastic frames come in both sizes, and are often labeled as being pyrethrin or brabstoglobin-free. These feeders should fit the size of your colony. Ending4: [substeps] On the downside, this is the least optimal type for attracting bees. Their soft, powdery shells add an additional element of comfort to the feeder.

Answer format: ending1/ending2/ending3/ending4