Answer: See explanation
Step-by-step explanation:
The creature caused the deaths of William and Justine because the creature believed that Victor wanted to destroy him and thus he had to therefore destroy the happiness of Victor. it should be noted that the creature is intelligent and has emotions and therefore cannot be considered to be a scientific experiment alone.
The creature will change through love and compassion. With regards to the statement, the psychological understanding that Shelley is showing here is that Shelley believes that the goodness in humanity is due to the love, duty and the compassion towards others.