True or false: cardiovascular endurance is defined as the boy's ability to use oxygen to meet energy demands of muscles through anaerobic exercise.
a. true
b. false

Ittle jake is strongly bonded to his mother. in fact, he has a difficult time letting her out of his sight. when his mother must leave him in daycare to go to work, the daycare provider calls because jake is inconsolable. since being placed in daycare, jake has also refused to sleep alone. what disorder do jake's symptoms suggest?