Carrier, developer, method, and apparatus for forming electrophotographic image, and process cartridge

A carrier for forming an electrophotographic image, comprising:

• a core particle comprising a manganese-based ferrite particle having an apparent density of from 2.0 to 2.2 g/cm3 and a magnetization of from 44 to 52 emu/g in a magnetic field of 500 Oe;
• and
• a coating layer coating a surface of the core particle, the coating layer containing a carbon black, an inorganic particle A, and an inorganic particle B,
• wherein the inorganic particle A and the carbon black each have a concentration gradient in a thickness direction of the coating layer, a concentration of the inorganic particle A increases toward a surface of the coating layer, and a concentration of the carbon black decreases toward the surface of the coating layer, and
• wherein the core particle has a magnetization of from greater than 60 to 70 or less emu/u in a magnetic field of 1.000 Oe.