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:
Molecule
Explanation:
A molecule is a term that refers to the smallest unit of a molecular compound with the properties of the compounds.
Molecules are like what atoms are to elements.
Every molecule of a compound possess the unique characteristics of the compound thereby typifying it.
The term molecule is often used to denote a covalent compound with a discrete or separate unit.
Answer:
D it causes river channels to change shape
The agricultural revolution in Britain was very important, if not the most important factor that led to the industrial revolution.
The reason for this is that with the agricultural revolution, the production on the farmlands increased significantly, and that trend was constantly going upwards. That led to a situation where there was much more production than what the country needed, so it had to be traded. But the trade of the crops was still limited, thus something new was needed, something that will enable the manufacturing of the goods, so that they can be preserved better and last longer, so that they can be traded further away. That economic pressure, led to multiple inventions, which resulted in the development of the industry, thus having the start of the industrial revolution.