Will mark brainliest which is an example of a generator?
a. a fan
b. a remote control car
c. a hydroelectric dam
d. all of the above.

coil wire, increase current, put iron inside the coil

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide