- The sun is a source of light / light energy called sunlight
- As a source of light moves directly overhead of an object , the size of the shadow of that object will decrease
- Hence, when the sun moves directly overhead of an object, the size of the shadow of that object will be the smallest

- When the sun moves directly overhead of an object, the size of the shadow of that object will be the smallest
- The sun is located directly overhead at noon
- Hence, the shadows of an object at noon will be the smallest

- The shadows of an object at noon will be the smallest
- A flagpole is a kind of object
- Therefore, the shadow of a flagpole will be the smallest at noon

Therefore, the shadow of a flagpole will be the smallest at noon
Question
At what time on a sunny day will the shadow of the school's flagpole be the shortest?

Context
- The sun is located directly overhead at noon 
- The sun is a source of light / light energy called sunlight 
- As a source of light moves directly overhead of an object , the size of the shadow of that object will decrease 
- A flagpole is a kind of object