A diagram shows how gravity on Earth works on an object located in different spots in a seaside community. Where is gravity between Earth and an object the strongest?

Gravity is generally strongest at sea level compared to higher altitudes because gravitational force decreases with distance from the center of the Earth.

• When the object is on top of a telephone pole: The height is relatively small compared to Earth's radius, so the effect on gravity is minimal.
• When the object is on the highest branch of a pine tree: Similarly, this height is also relatively insignificant in terms of the distance from Earth's center.
• When the object is on top of a nearby mountain: While this is a greater elevation, gravity is still weaker compared to sea level.
• When an object is at sea level: This is where gravity is at its strongest compared to the other locations mentioned.

Therefore, the answer is when an object is at sea level.