9. explain how band ratios can be used to reduce topographic shading and emphasise areas of images with high levels of clays and iron oxides. mention any advantages and disadvantages of this technique

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion

Poverty can be changed through new jobs , raising the minimum wage , and support pay equality.

Ithink this answer here is a or d