Answer:a. increased; remained almost unchanged.
Explanation:
The land structure, being flat or with hills. Could provide a lack or increase of defense, hills being used as a shield. Bodies of water have been used to hide out, but also provide drink to soldiers, foggy weather can make it difficult to see the enemy.
The answer is arousal theory
Arousal theory is a motivation theory that state human motivation changes from day to day hence high arousal events are remembered better than low arousal events. This applies the same way to human emotions where by strong emotions form strong memories while weak emotions form weak memory
<span>The fact that certain psychological effects appear to shrink over time is called the decline effect.
When something diminishes in power, or shrinks over time (like certain psychological effects in this case), it refers to the decline effect - it means that these is less of something, or it becomes weaker in power.</span>
