Answer: Option A. "Arms"
Explanation:
Pectoral girdle is also known as shoulder girdle, are the bones that attach upper limb to the axial skeleton. 
Pectoral girdle majorly functions to support arms. It contains two bones, the  clavicle and scapula. 
Pectoral girdle can also defined as the set of bones in the skeleton that connects to the arm on each side.
Hence, the correct option is A.
 
        
             
        
        
        
Answer:
The correct answer would be - 5000 meter or 5 kilometers
Explanation:
Given:
Speed = 500 meter/minute
Time = 10 minutes
Distance would be covered = ?
Formula used:
speed = distance/ time
then, Distance = speed*time
Solution:
Putting values in the provided formula:
Distance = speed*time
distance = 500*10 meters
               = 5000 meters or 5 kilometer (1000 meter = 1 kilometer)
 
        
             
        
        
        
The answer is: 'constrict the blood vessels in their large ears to reduce transfer of external heat to the blood in their ears.' This is an example of thermoregulation. Thermoregulation is the ability of the<span> </span>body to keep body temperature<span> within certain boundaries, even when the temperature of the surrounding environment is very different. The regulation of temperature by thermoregulating organisms is one aspect of </span>homeostasis. By using heat exchange systems, such as employed in this example, the animal will need to expend less energy on behavioural adaptations to maintain a constant body temperature.
        
             
        
        
        
C) Occurs in areas without soil.
Primary succession occurs in lifeless areas in which <span>soil that is incapable of sustaining life is formed due to lava, sand dunes, and </span><span>rocks left from a retreating glacier.</span>