What is the most valuable and best branches of the economy (for one country)?

Use of available resources and developing them to its own benefit.

According to the possibilities of each countryFor usAgriculture, industry

Infrastructure as it attracts more people , more industries (not matter what vertical) and also nurtures talent, technology and develops country in all aspects

Is not it best to invest in the food industry (eg growing crops: wheat ...), because I think that food is the most valuable and everything else we give her. My opinion is the one who has large stocks of wheat (food) can bring down the cost of other products and resources while others can not. Do not USA the largest producer of wheat? Is it not her strongest weapon for negotiations at the present time? Do you agree this is my opinion or wrong?

is tourism, but unfortunately after the revolution is a disaster

I don't understand what's you want in your question??

i bilive  it is education   due to it is the modern way to develop  neation

Conceptually, for any country:

- Define your strenghts and capitalize on them.

- Define youe weaknesses and work on strengthening them.

I see that efforts within these lines will empower any country's economy.

Labour Market

The question is not clear enough.

Real estate investingbesttypes of investments, although itis exposedat certain timesof thetremors.