Combine two sentences by using the ing-forms as in the example: Economics is a social science. It studies economy. – – Economics is a social science studying economy. – Economics is a science. It attempts to fi...

Combine two sentences by using the ing-forms as in the example: Economics is a social science. It studies economy. – – Economics is a social science studying economy. – Economics is a science. It attempts to find economic laws. – Economists make predictions. They form the basis of economic theories. – There is a figure. It shows the interrelations between models, theories and reality. – It is a text. It speaks about economics. – It is a book. It speaks about some interesting observations.