| LIST I | LIST II | ||
| A. | Ox-bow lake | I. | Wind |
| B. | Playa | II. | Glacier |
| C. | Cirque | III. | River |
| D. | Dunes | IV. | Lake |
Two important characteristics for estimating any population of animals and plants are \(\underline{\hspace{2cm}}\) and \(\underline{\hspace{2cm}}\) of individuals.
Demography is the study of factors that affect \(\underline{\hspace{2cm}}\) and \(\underline{\hspace{2cm}}\) patterns.