Answer:
Protein serves as natural boost for immune system's fight against infection, tumors.
Answer:
A vegetarian diet is not an option for most people because eating meat is too ingrained in most "option ingrained" diets.
Explanation:
Valence electrons can be found by determining the electronic configurations of elements. Thereafter the number of electrons in the outermost shell gives the total number of valence electrons in that element.
The closed economy is a self sufficient economy. The countries following a closed economy system does not involve in the import and export of goods from other nations. In these countries, all the goods are produced in the country is consumed within the country itself.
Brazil is a country, which can be said as closed economy as Brazil imports a very item from other nations. A Complete close economy system is not present in any country yet.