A. There were animals 3 billion years ago; they just weren't fossilized. B. Animals are warm-blooded; the ocean was too cold for animals.
        
             
        
        
        
Answer:
The population of predators will decrease as well because without their prey they won't have anything to feast on for nutrition. So they will decrease without prey. 
 
        
             
        
        
        
Answer:
I think 
Abiotic natural capital comprises subsoil assets (e.g. fossil fuels, minerals, metals) and abiotic flows.
Biotic natural capital or ecosystem capital consists of ecosystems, which deliver a wide range of valuable services.
Hope this Help!:)
 
        
                    
             
        
        
        
Answer:
The main properties of water are its polarity, cohesion, adhesion, surface tension, high specific heat, and evaporative cooling.
Explanation:
The main properties of water are its: 
- polarity
- cohesion
- adhesion
- surface tension
- high specific heat
- evaporative cooling
 
        
             
        
        
        
All of the characteristics of life, hope I’ve helped ;)