Which reasons are the best for using only the fine-focus knob under high power? select two. the diaphragm will not open wide enough by using the fine-focus knob. the stage or objectives move very little when the knob is turned. the objective will not move enough to risk breaking the glass slide. the coarse-focus knob will not turn when the microscope is set for high power

The 2 that you  will need to select are B and C.

B) The stage or objectives move very little when the knob is turned.

C) The objective will not move enough to risk breaking the glass slide.

i tried the eyeshadow trick you told me about and it worked so good i i did a yellow going into orange colors and it was bright and you could see it on my eyes

some of your causes might be acidic rain or natural wildfires that cause the parks to be degraded

hope this any more questions i am here plz mark brainliest