<span>length- roads, yard stick, square footage in a room</span>
The first step of the scientific method is to MAKE OBSERVATIONS
I think d because they are both increasing
An electromagnet is a device that sends electricity through a coil of wire to produce a magnetic field. This leads to a magnet that can be controlled - turned on and off with the flip of a switch, or increased or decreased in strength. The coils are often wrapped around a regular magnet to make it stronger.
