Need the answers to this

Why is the price of rice so important? a. rice prices must be kept within reach of the poorest peopleb. rice prices must make a large profit or no one will grow itc. rice prices impact the cost of fruits and vegetables on neighboring farmsb. rice prices have no real importance other than to large corporations

Suggest two reasons why irrigation is important for human development of the desert (4 marks)

What is the approximate chemical composition of the solar nebula?