Los efectos o respuestas que ocurren cuando se manipulan variables en un experimento se observan sobre: * (1 Point) el problema
la variable independiente
las variables controladas
la variable dependiente​

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land