D. Silicon is the correct answer.
The answers are:
a. physical geography
b. human geography
Geography is divided into two main branches, physical geography, and human geography, and after that, they branch out much more and include the other geographical disciplines in them.
Physical geography is mainly concerned with the study of the natural characteristics of the Earth, both the ones on the surface and the once close to the surface.
Human geography is mainly focused on the study of the human race, the background, perceptions, interactions, organizing, human groups, effects on and from the environment etc.
Answer:
Morenas, guapas, jóvenes, grandes y traviesas son modificadores directos.
Explicación:
En estas frases, Brown, bella, joven, grande y traviesa son modificadores directos. En las oraciones, el perro es modificado por marrón, el coleccionista es modificado por bello, el galán es modificado por joven, el premio es modificado por grande y el niño es modificado por travieso. Un modificador es una palabra, frase o cláusula que modifica o da información sobre otra palabra que está presente en la misma oración.
There are four settled societies that each developed agriculture independently along major rivers that are traditionally considered the early river valley civilizations. The are the Mesopotamian civilizations, the Nile River civilizations, the Indus River civilizations, and the Yellow and Yangtze River civilizations.
