Regions with a polar climate are characterized by a lack of warm summers. what are the two sub-types of a polar climate? a) arid and semiarid b) tropic and monsoon c) tundra and ice cap d) temperate and mesothermal

Ineed to know why d is the correct answer asap

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased