Which statement is not true for a magnetic field? O A. A magnetic field occurs near a wire that has no current.
O B. A magnetic field is produced by a magnet with two poles.
OÇ. A magnetic field loops from the north pole to the south pole.
D. A magnetic field occurs near a current-carrying wire.

Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.