Starsa. begin as protostars, which fire up when they collapse and become denser and hotter. b. create elements by splitting the nuclei of small atoms into the nuclei of larger atoms. c. have unlimited amounts of fuel and therefore exist indefinitely. d. all explode cataclysmically when they die and contribute their matter to future star generations

A

Explanation:

Begin as protostars, which fire up when they collapse and become denser and hotter.

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.