In Period 2, as the elements are considered from left to right, there is a decrease in
A. Nonmetallic character
b metallic character
C atomic mass
D ionization energy

it will option B ,hope it helps

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

: )

diaria maybe go see a doctor about that