Which statement best describes the theory of plate tectonics? A.) Plates sometimes move closer to one another.

B.) Sections of Earth that shift are part of Earth’s asthenosphere.

C.) Sections of Earth’s continents are in slow, constant movement.

D.) Parts of the ocean floor move as they are carried by rift valleys.

Plzz hurry im being timed during times of vigorous physical activity, muscles require a constant supply of oxygen. how does the body respond to these needs? a. breathing rate and heart rate both decrease. b. breathing rate and heart rate both increase. c. heart rate decreases, but breathing rate remains stable. d. breathing rate increases, but heart rate remains stable.

Always use significant figure rules. remember that these rules apply to all numbers that are measurements. if a vector that is 3 cm long represents 30 km/h, what velocity does a 5 cm long vector which is drawn using the same scale represent? a.100 km/h b.60km/h c.50km/h

Apatient is in need of hydration. which type of solution are the patient's cells most likely in?