What defines a holographic will?

A holographic will is specifically defined as a will that is written entirely in the handwriting of the testator. This type of will typically does not need to be witnessed or notarized, which distinguishes it from formal wills that often require specific legal formalities for validity. The essence of a holographic will lies in the testator's personal involvement in creating it, which reflects their intent more directly than a will that is drafted by a lawyer or typed by someone else.

The other options describe characteristics that do not align with the definition of a holographic will. For instance, a holographic will does not necessitate notarization, nor does it relate to oral declarations made before witnesses, which are typically associated with verbal wills. Additionally, while legal counsel may be beneficial when drafting any type of will, it is not a requirement for the validity of a holographic will. Therefore, option B accurately captures the defining trait of a holographic will.