The human-animal bond is a mutually beneficial and dynamic relationship between people and animals that is influenced by behaviors essential to the health and wellbeing of both. This includes, among other things, emotional, psychological, and physical interactions of people, animals, and the environment.
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"As a result" indicates a cause-and-effect sentence. This sentence discusses the price of shipping goods, which lessened due to better ways of transportation. The price lessening is a result of of new transportation methods, so "As a result" is the correct answer.