Feudalism declined during the Crusades because B. many knights lost their lives and fortunes in battle.
<h3>What is Feudalism?</h3>
This refers to the system of land ownership where a lord gives out land to his faithful vassal, as reward for work.
Hence, we can see that this system declined during the Crusades primarily because there was a great loss of life by the knights in the bitter battle that ensued.
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The Boll Weevil was an insect that destroyed crops in Alabama in Georgia. The reason they were effect at different times is because they had different crops and the Boll Weevil migrated at different times.
Prenatal Exposure to Air Pollution and Early Life Stress Effects on Hippocampal Sub regional Volumes and Associations with Visual-Spatial Reasoning may lead to severe complications like brain-derived neurotrophic factor.
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What are the Effects on Hippocampal Sub regional Volumes?</h3>
- The hippocampus is also changed by exposure to air pollution, with various effects seen in different hippocampal subfields.
- Following perinatal air pollution exposure in animal models, decreased structural integrity throughout the hippocampus, decreased neurogenesis in the dentate gyrus, and activated microglia in the dentate gyrus and CA1 subfields have all been noted.
- It has been demonstrated that prenatal exposure to PM2.5 is followed by decreased hippocampus brain-derived neurotrophic factor (BDNF) expression and decreased dendritic branching in the CA1 and CA3 subregions.
- In the past, studies on humans have also concentrated on polycyclic aromatic hydrocarbons (PAHs), a class of air pollutants produced by incomplete combustion of organic materials and cigarette smoke, grilling, oil- and coal-burning power plants, and vehicle emissions.
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