Natural vegetation vary according to place. Give reason

If i see a courtesan and a naked person do i call the police?

"it is one thing to say that the police cannot be used as an instrument for the suppression of unpopular views, and another to say that, when as here the speaker passes the bounds of argument and undertakes incitement to riot, they are powerless to prevent a breach of peace." --chief justice fred m. vinson, 1951 chief justice fred m. vinson's writings in feiner v. new york conclude that freedom of speech must be protected at all costs, including a breach of the peace. select the best answer from the choices provided ot of next submit mark this and return

The authors of the paper "fudging the numbers: distributing chocolate influences student evaluations of an undergraduate course"† carried out a study to see if events unrelated to an undergraduate course could affect student evaluations. students enrolled in statistics courses taught by the same instructor participated in the study. all students attended the same lectures and one of six discussion sections that met once a week. at the end of the course, the researchers chose three of the discussion sections to be the "chocolate group." students in these three sections were offered chocolate prior to having them fill out course evaluations. students in the other three sections were not offered chocolate. the researchers concluded that "overall, students offered chocolate gave more positive evaluations than students not offered chocolate." indicate whether the study is an observational study or an experiment. give a brief explanation for your choice.