What Chozo statue power-up restores Samus's ability to shoot ice in the original Metroid? The power-up is the Ice Beam.
In the original 1986 Metroid, Samus finds the Ice Beam inside a Chozo statue on Zebes. The weapon changes her standard shots into freezing blasts that immobilize many enemies. Frozen enemies can then serve as temporary platforms, allowing Samus to reach otherwise inaccessible ledges and passages.
The Ice Beam is especially important in the final section of the game because Metroids must be frozen before Samus can destroy them with missiles. The original game contains two Ice Beam locations, helping prevent players from becoming unable to progress if they replace the weapon with another beam upgrade.
The other options belong to different functions or contexts. The Charge Beam is associated with charged shots, the Wave Beam passes through obstacles, and the Plasma Beam is a later upgrade in the series. Although later games rearrange beam abilities and locations, Ice Beam remains the precise answer for the original Metroid.