Can someone answer this please?​

You see a white marker with an orange circle and black lettering. what does this marker tell you

Temperatures in ponds and lakes vary by season. select the best answer from the choices provided t f

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.