Question

electric current is the flow of charged particles called
protons.
electrons.
sparks
static.

Explanation:

Electric current is defined as the flow of charged particles. In most conductive materials (like metals), the mobile charged particles responsible for current flow are electrons (negatively charged particles). Protons are bound in atomic nuclei and not mobile in typical conductors. Sparks are a visible effect of current, not the particles themselves. Static refers to stationary electric charge, not flowing charge.

Answer:

electrons.