what keeps humans warm?
Animal fur Solar energy wind radiation Evaporation snow magnets exoskeleton
A B C D E F G H
Radiation is the major method of heat transfer warming Bob's face.
radiation keeps humans warm
what keeps humans warm? (A) Animal fur (B) Solar energy (C) wind (D) radiation (E) Evaporation (F) snow (G) magnets (H) exoskeleton