back to entry
0/50
conserve
mastery/ˈkɒnsɜː(ɹ)v/nounverb
card 1 of 8 · fill in the blank
When bears sleep during winter, their body temperature drops to help them _____ energy.
card 1 of 8 · fill in the blank
When bears sleep during winter, their body temperature drops to help them _____ energy.