_________ can be reactions to internal stimuli (such as thoughts or memories) or events that occur in our environment?

Emotions can be reactions to internal stimuli (such as thoughts or memories) or events that occur in our environment.

Here's a step-by-step breakdown:

1. Identify the subject of the sentence: The blank space at the beginning of the sentence needs to be filled with a noun that can be a reaction to both internal and external stimuli.

2. Consider the context: The sentence mentions two types of stimuli:

   • Internal stimuli (such as thoughts or memories)
   • External stimuli (events that occur in our environment)

3. Determine the appropriate noun: The noun should be something that can be influenced by both internal and external factors. Emotions fit this description well because they can arise from internal thoughts and memories as well as from external events.

4. Fill in the blank: Insert the word "Emotions" into the blank space.

So, the complete sentence is: "Emotions can be reactions to internal stimuli (such as thoughts or memories) or events that occur in our environment."