Answer:
i want to say 6 but I am not sure 
 
        
             
        
        
        
Answer:
Phase III
Explanation:
The given condition fall in the trial phase (Phase III)  of cinical study which aims to:
- Determine drug's effectiveness (primary goal)
- Determine long-term drug safety
- Confirm findings 
In Phase III, randomised, double-blind, placebo-controlled, parallel group study is majorly to evaluate the efficacy and safety of placebo in episodic migraine prevention in children (6 to < 12 years of age) and adolescents (12 to < 18 years of age).  
The trial consists of four phases: screening; double-blind therapy period for 24 weeks in which placebo or Erenumab is given to subject as dose 1, dose 2 or dose 3 (based on the participant's body weight) once a month via subcutaneous injection; optional dose level blinded extension phase (40 weeks) which involves subjects recieve dose1, 2 and 3 of placebo, and at last it follows a safety follow-up phase for 12 weeks (after 16 weeks  of the last dose of investigational drug).
Hence, the clinical phase is phase III.
 
        
             
        
        
        
Explanation: 
A rock would experience a temperature of 5500°C is about the core which is at a depth of 220km. 
But let us use the earth's geothermal gradient to solve this problem. 
The geothermal gradient is the rate at which temperature is increasing with depth. 
The geothermal gradient 25°C/km
         At 5500°C, 
                5500°C x   
   =    220km
  =    220km
But this is not so in nature, there are other heat sources that contributes to increasing temperature with depth such as radioactive heat and frictional heat. 
learn more: 
Mantle brainly.com/question/10758534
#learnwithBrainly
 
        
             
        
        
        
hemistry is the "scientific study of matter, its properties, and interactions with other matter and with energy". ... It is an experimental science in which theories are developed and tested against observations. The goals of physics include explaining and predicting how the universe works. Biology is the study of life.
 
        
                    
             
        
        
        
Fish and bird are biotic and the bird would hurt the fish depending on the species of birds since some birds are carnivores.