According to this figure, at what time in the evolutionary history of plants did vascular systems likely first evolve? 
Definitions:
Euphoria
A feeling or state of intense excitement and happiness.
Sociocognitive Approach
A theory in psychology that combines social, cognitive, and behavioral factors to understand and predict human behavior.
Hypnosis
A trance-like state of focused attention and increased suggestibility that is often used for therapeutic purposes.
Role
The function or part played by a person or thing in a particular situation, often defined by societal norms, expectations, and individual behavior.
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