The Greeks are risk measures that represent how sensitive an option’s price is to various factors.

– **Delta**: Measures the rate of change of the option price with respect to changes in the underlying asset’s price. Delta ranges between 0 and 1 for call options, and -1 and 0 for put options.

– **Gamma**: Measures the rate of change in the delta with respect to changes in the underlying price. It shows the risk from changing Delta.

– **Theta**: Measures the sensitivity of the option’s price to the passage of time, also known as time decay.

– **Vega**: Measures sensitivity to volatility. It represents the amount that the option’s price changes in reaction to a 1% change in the volatility of the underlying asset.

– **Rho**: Measures sensitivity to the interest rate. It represents the change in the option price with respect to a change in the risk-free interest rate.

– Reference: [Investopedia: Greeks](https://www.investopedia.com/terms/g/greeks.asp)