The body of the Parliament that can be dissolved by the President is the Lok Sabha.

Explanation:
The Parliament of India consists of two houses - the Rajya Sabha (Council of States) and the Lok Sabha (House of the People). Both houses play important roles in the legislative process and have specific responsibilities.

The Rajya Sabha is the upper house of Parliament, representing the states and union territories of India. It consists of members who are indirectly elected by the members of the State Legislative Assemblies. The Rajya Sabha is a permanent body and cannot be dissolved. The members of the Rajya Sabha have a fixed term of six years, and one-third of its members retire every two years.

On the other hand, the Lok Sabha is the lower house of Parliament and represents the people of India. It consists of members who are directly elected by the people through general elections. The Lok Sabha is a temporary body and can be dissolved by the President of India.

When the President dissolves the Lok Sabha, it means that the current term of the Lok Sabha comes to an end before its full five-year tenure. After the dissolution, new elections are conducted, and a new Lok Sabha is formed. The power to dissolve the Lok Sabha lies with the President, who exercises this power on the advice of the Prime Minister.

The dissolution of the Lok Sabha can occur under various circumstances, such as:

1. Completion of the five-year term: The Lok Sabha automatically dissolves after completing its full five-year term, unless dissolved earlier.

2. Loss of confidence: If the government loses support or confidence in the Lok Sabha and cannot prove its majority, the President may dissolve the Lok Sabha and call for fresh elections.

3. Mid-term dissolution: The President, on the advice of the Prime Minister, may dissolve the Lok Sabha before the completion of its full term if deemed necessary.

In summary, while the Rajya Sabha is a permanent body that cannot be dissolved, the Lok Sabha is a temporary body that can be dissolved by the President. Dissolving the Lok Sabha leads to the formation of a new Lok Sabha through fresh elections.