<span>1.keeps tooth alive </span><span>pulp 2.surface of teeth enamel 3.tube carrying food to stomach esophagus 4.last major organ in digestive system large intestine 5.digestive organ located above waist, close to ribs stomach 6.first stage of digestion takes place here mouth 7.regular squeezing movements peristatiss 8.blood vessel leading from heart artery 9. windpipe trachea</span>
Answer: B:The drought decreased the grass and vegetation on the ground, leaving only vegetation on shrubs and trees above the ground. Natural selection selected for the tortoises with the domed shells and hoods.