Step 1: Understanding Gravitational Potential Energy
Gravitational potential energy (GPE) is given by the formula:
\[
\text{GPE} = mgh
\]
where \( m \) is the mass of the object, \( g \) is the acceleration due to gravity, and \( h \) is the height above a reference point. Since the mass \( m \) is the same in each case, the change in gravitational potential energy depends only on the change in height \( h \).
Step 2: Analyzing Each Scenario
Object moves from sea level to the top of a large mountain: This scenario involves a significant increase in height, resulting in a large change in gravitational potential energy.
Object moves from sea level to 5 m above sea level: This scenario involves a smaller increase in height compared to the first scenario, resulting in a smaller change in gravitational potential energy.
Object moves horizontally: In this scenario, there is no change in height, so the change in gravitational potential energy is zero.
Step 3: Arranging the Scenarios
Based on the analysis, we can arrange the scenarios in order of decreasing change in gravitational potential energy:
Object moves from sea level to the top of a large mountain.
Object moves from sea level to 5 m above sea level.
Object moves horizontally.
Final Answer
\[
\boxed{
\begin{array}{l}
\text{1. Object moves from sea level to the top of a large mountain.} \\
\text{2. Object moves from sea level to 5 m above sea level.} \\
\text{3. Object moves horizontally.}
\end{array}
}
\]