Consider the following figure to answer the following questions: 
-During which period was the economy in an expansion?
Definitions:
Sulfur Bacteria
A group of bacteria that oxidize sulfur compounds to obtain energy, playing a key role in the sulfur cycle in the environment.
Haemophilus Bacteria
A group of bacteria that can cause various infections in humans, including respiratory infections and meningitis.
Biofilms
Complex communities of microorganisms that adhere to surfaces and are encased in a self-produced protective matrix.
Dental Plaque
A sticky film of bacteria and substances they produce, which accumulates on teeth and can lead to dental caries and gum disease if not regularly removed.
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