What is ph?
a. the negative logarithm of the hydroxide ion concentration
b. the positive logarithm of the hydroxide ion concentration
c. the negative logarithm of the hydrogen ion concentration
d. the positive logarithm of the hydrogen ion concentration

*tilts head* sounds more like a statement

i would say b

explanation:

but i think i would need more information than that

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.

: )