Warding Off Predators Attacks on livestock by predators are a common problem for ranchers. A research team wanted to know if artificial marks placed on livestock could be a cost-effective tool in warding off attacks. To assess the effectiveness of the artificial marks, the team selected 14 cattle herds in Botswana. Within each herd, adult cattle were randomly assigned into one of three treatment groups: 1- artificial eyespots (a): 2-cross-marked (b); or 3- unmarked (c) Over a period of 30 days, the number of cattle in each herd attacked by predators w recorded Did the researchers conduct an observational study or an experiment? Explain how you know. Observational Study Explain your thinking. Experiment