Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. of the remaining energy, some is used for the organisms life processes and the rest
a. used in reproduction
b. stored as body tissue
c. stored as fat
d. eliminated as heat

The right answer is D.eliminated as heat

It takes energy (heat or work) to break a link. And the formation of a bond is a phenomenon that releases energy (and in general heat)

In an exothermic reaction, bonds are broken, but more is formed than broken. The overall effect is a release of energy (therefore heat). The heat released is equal to the internal energy variation of the system.

protist eukaryotes that are not plants, animals, or fungi ("misfits")

i would say it is