from typing import Optional


def ealive(self, elem: str = "", **kwargs) -> Optional[str]:
    """Reactivates an element (for the birth and death capability).

    APDL Command: EALIVE

    Parameters
    ----------
    elem
        Element to be reactivated:

        ALL  - Reactivates all selected elements (ESEL).

        Comp - Specifies a component name.

    Notes
    -----
    Reactivates the specified element when the birth and death
    capability is being used. An element can be reactivated only
    after it has been deactivated (EKILL).

    Reactivated elements have a zero strain (or thermal heat
    storage, etc.)  state.

    ANSYS, Inc. recommends using the element
    deactivation/reactivation procedure for analyses involving
    linear elastic materials only. Do not use element
    deactivation/reactivation in analyses involving time-
    dependent materials, such as viscoelasticity, viscoplasticity,
    and creep analysis.

    This command is also valid in PREP7.
    """
    command = f"EALIVE,{elem}"
    return self.run(command, **kwargs)