Answer:
This topic is not included in the study of Physical Geology: A) How Earth's mantle was formed.
Step-by-step explanation:
We have a couple of topics and we need to find which is not included in the Physical Geology field.
Physical geology is part of a geological study that has to do with the study of rocks, soils, and minerals and the processes through which they are formed. Physical geologists study occurrences of different phenomena such as: earthquakes, volcanoes, erosion, weathering, glacier formation, among many others. Formation of earth's mantle is not topic of physical geology.
Finally, we can conclude that This topic is not included in the study of Physical Geology: A) How Earth's mantle was formed.