1. The problem asks us to determine which conclusion is appropriate based on the researcher's findings about guinea pigs and wild cavies crossing virtual squares in different habitats and at different ages. 2. The key findings are: - Wild cavies crossed more squares than guinea pigs during early adolescence. - Both groups decreased their crossings from early to late adolescence. 3. Let's analyze each option: Ⓐ Claims the difference between age groups is caused by habitat differences. However, the study compares behavior across age groups within habitats, so habitat is not the cause of age-related differences. Ⓑ States the difference between age groups was caused by aging. Since the decrease in crossings from early to late adolescence is observed in both groups, aging is a plausible cause. Ⓒ Suggests the early adolescence difference can be generalized to all guinea pigs and wild cavies. The study only sampled animals from specific habitats, so generalization to all animals is not justified. Ⓓ States the early adolescence difference can only be generalized to the habitats studied, which is a cautious and appropriate conclusion given the sample. 4. Therefore, the most appropriate conclusion is option Ⓓ. Final answer: Ⓓ The statistically significant difference in behavior during early adolescence between the two groups of animals can only be generalized to the habitats in the study.