The Columbian Exchange has brought new species to Europe. This includes new plant species, such as tomatoes and potatoes which have help combat hunger in Europe. This can be seen for example through the fact that when potato has a blight it caused the great famine in Ireland. However, the Columbian Exchange was not only positive for Europe as it also introduced sicknesses such as syphilis.
The seven step military solving process is sequence of steps that help any leader work through a problem.
The last (seventh) step in the seven step military solving process is : Making and implementing the decision and analyzing solution for effectiveness.
The first step on the other hand is identifying the problem.
Answer:
D. generally much more expensive to produce than water produced using other methods
Explanation:
Producing freshwater through desalination usually being done for water that's taken from the sea. The water from the sea contains high amount of sodium, which will be unconsumable before we extract the sodium content. Desalination is the term for the process to extract that sodium.
This process is expensive. Typically, The desalination process could cost the producer around $0.13MM to $0.40MM per thousand 
/day. Taking fresh water from other sources (such as clean river) will completely overlook this additional cost.
Rockpaperscissors (roshambo) is an example of a simultaneous game.
Simultaneous is defined as happening at the same time. Simultaneously broadcasting two television programs on different channels is an example of a situation in which programs are broadcast at the same time.
Common synonyms for concurrent include concurrent, simultaneous, contemporaneous, contemporaneous, and synchronous. All of these words mean ``to exist or occur at the same time,'' but ``at the same time'' means to coincide with a particular moment. The two shots were simultaneous.
Simultaneously (= happened or happened exactly at the same time): Two children answered the teacher's question at the same time. This network broadcast his four games simultaneously across the country.
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