Rachel has a pessimistic attitude. she worries incessantly about things and can never seem to see the positive side of life. according to the biological perspective, rachel's attitude could best be explained by low levels of multiple choice glutamate. serotonin. dopamine. adrenaline.

Having a pessimistic attitude shows having low levels of SEROTONIN. Being pessimistic shows that a person always thinks of the worst or always thinking negative. Some study states that low levels of serotonin will give a person a tendency to be depressed and to feel down.

depends.

explanation:

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.