1. Compression and Heating:

- The increased gravity pulled more mass towards the center of the planet, causing the planet to compress under its own weight.

- The compression process generated immense heat in the planet's interior, resulting in a high core temperature.

2. Formation of Layers:

- Gravitational pressure separated different materials within the planet based on their densities. Heavier materials like iron and nickel sank towards the center of the planet, forming the metallic core.

- Less dense materials such as rocky silicates moved toward the outer parts of the planet, creating the mantle and crust.

3. Atmosphere Retention:

- High gravitational force ensured that any atmosphere or gases initially present around the planet were strongly held and not easily lost into space. This allowed for the accumulation and retention of an atmosphere later on.

4. Core Differentiation:

- Gravity drove the elements to settle according to their densities deep within the planet. Metals and heavy elements migrated toward the center to form a distinct molten metallic core, leaving rocky components in the silicate mantle.

5. Tectonic Activity:

- As the core and mantle continued to heat up under immense pressure, convection currents were established. Heat transfer through these currents led to tectonic activity, surface volcanism, mountain formation, and large-scale crustal movement.

Overall, the increased gravity during the formation of a planet created an environment that allowed for distinct layers to develop, facilitated core differentiation, generated enough heat to power geological processes, and maintained an atmosphere, all of which shaped the eventual architecture and character of the planet.