Which of the following is the negative space enclosed by letterforms called

The negative space enclosed by letterforms is called the "counter."

What is indicated in green in the word envelope

As an AI language model, I cannot see the word "envelope." However, assuming the question refers to the typical spelling of the word, nothing is necessarily indicated in green.

The negative space enclosed by letterforms is called the "counter." To identify the counter, you need to visually examine the shape formed within the boundaries of the letters themselves. This can be done by looking for the empty spaces or the areas that are not occupied by the actual strokes or solid parts of the letters. The counter is the space that creates a contrast between the positive space (the letterform itself) and the background or other elements around it. By visually understanding the composition of the letterforms, you can identify and differentiate the counter space within the letters.