Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to identify a black widow spider [title] Look for red markings on female black widows. [step] Female black widows are best known for the red spots on their bellies. A black widow may have a connected red hourglass shape on the underbelly, or two triangles that don't touch in a slight hourglass shape.

Ending1: [substeps] One type of black widow has a row of reddish dots instead of the hourglass shape that the species is known for. There is a lot of variation in the coloring of black widows. Ending2: You might also find white, cream, or gray markings, usually around the anus. [substeps] Female black widows will have two clusters of red and black markings that are half on top and half off on top. Ending3: [substeps] Female black widows typically grow to be at least 1 foot (0.3 m) at the base of their tubular outermost spindles. [title] Note black widows may have black markings on the pads of their feet. Ending4: The female black widow is perhaps the nastiest of the male black widows. [substeps] Along the underbelly of the female black widow, the intact serrations may have separate red stripes or small black markings.

Answer format: ending1/ending2/ending3/ending4