Here's a breakdown:

* Limonene is a cyclic alkene, meaning it contains a carbon-carbon double bond.

* Bromine water is a solution of bromine (Br₂) in water.

* Electrophilic addition is a type of reaction where an electrophile (an electron-seeking species) adds to a double bond.

In this reaction, the bromine molecule acts as the electrophile. The double bond in limonene is rich in electrons, making it susceptible to attack by the electrophilic bromine.

The steps involved are:

1. Electrophilic attack: The bromine molecule approaches the double bond and forms a cyclic bromonium ion intermediate.

2. Nucleophilic attack: Water, acting as a nucleophile, attacks the bromonium ion, opening the ring and forming a bromohydrin (a molecule with both a bromine and a hydroxyl group).

The overall reaction can be represented as:

Limonene + Br₂ + H₂O → Bromohydrin of Limonene

This reaction is a classic example of how alkenes react with halogens, and it's used to identify the presence of double bonds in organic compounds.