Answer:
Providing a controlled source of water vapour through which water can be vaporized into the plant envoirment. 
Explanation:
Humidity ratio is the ratio of the mass of water in air to the mass of dry air. Humidity is needed in some conditions where the air is very dry. In a very dry air setting, there can be excess moisture loss from the plant surface, increasing the Humidity ratio can counter this effects and reduce excess moisture loss. 
 
        
             
        
        
        
Answer:
Peru
Potato Facts: Origins of the Potato
The Inca Indians in Peru were the first to cultivate potatoes around 8,000 BC to 5,000 B.C. In 1536 Spanish Conquistadors conquered Peru, discovered the flavors of the potato, and carried them to Europe.
Explanation:
Hope this helps!!!!!
Forever friend and helper,
Cammie:)
 
        
                    
             
        
        
        
<h2>Answer</h2>
- Wind
- Sunlight
- Plants
- Soil
- Coal
- Minerals
- Water
- Animals

In short it's natural resources.
 
        
        
        
I suggest that you should try C......
 
        
             
        
        
        
The speed of a sound wave depends upon the medium through which it travels. In general, sound travels faster through solids than through liquids or gases. Also, the denser the medium, the slower sound will travel through it. The same sound will travel at a different speed on a cold day than it would on a warm day.