Identifying Behavioral Bias in Investment Decisions

A financial advisor is meeting with a client, Sarah, who has recently inherited a substantial sum of money. Sarah, a risk-averse individual, expresses a desire to invest in low-risk bonds due to her fear of market volatility, despite her advisor's suggestion of including equities for long-term growth potential. This scenario illustrates the concept of behavioral biases in wealth management.

What behavioral finance concept is primarily influencing Sarah's investment decision?