Why do rabbits from polar regions have white fur?

Aphysical object or commodity is known as: select the best answer choice. a. good b. service c. item d. product

During sensitive periods of brain development like cell migration the brain is vulnerable to effects like: a. malnutrition b. infection c. toxins /drug use d. b and c e. all of the above

Alert inattentive or drowsy drivers when they veer off the road ?