But T. J. did not follow immediately. He remained standing in the middle of the compound, his face puzzled and undecided. I had never seen him look more desolately alone, and for a fleeting second I felt almost sorry for him. What does T. J. most likely feel in the excerpt?
A. happy with himself
B. unsure of himself
C. pride in himself
D. sorry for himself

Which statement is a good description of a model? a) models are a description of nature based only on one or two variables. b) models are testable ideas but they are not very to most people. c) models are a description of nature that predicts more accurately than real events. d) models are an approximiation of a real system that omits all but most essential variables in a system.