The asthenosphere is weaker and less rigid than the overlying lithosphere.
Answer:
A. human-environment interaction
Explanation:
This kind of study which involves impact of human activities on the environment falls under the human-environment interaction theme of geography.
It entails how human activities continues to shape his immediate environment.
- Geographic theme of location is associated with where on earth something can be found. It could be absolute or relative location.
- Geographic theme of place involves the physical and human setting of a place.
- Geographic theme of region defines a particular area which are classified under some certain categories.
The fitting answer to this problem is the theme of human - environment interaction.
Light colored igneous rock is called felsic, it is high in quartz, muscovite mica, and orthoclase feldspar content. Dark colored igneous rock is called mafic, and contains a lesser amount of silica along with olivine, pyroxene, amphibole, biotite mica, and plagioclase feldspa
<span>Light coloured igneous rocks (felsic) tend to have greater silica and aluminum content and a lower iron and magnesium content than dark (mafic) rocks.</span>
