Explanation

The sentence establishes a direct contrast: the printed photograph is the antithesis of the digital image. The digital image is described as something that "dissolve[s] from the screen... leaving no trace." Therefore, the printed photograph must be the opposite-something physically real, enduring, and materially present.

The clues that seal this are:
The phrase "material presence demands to be acknowledged" explicitly points to physical, touchable qualities.
The words palpable and tangible are exact synonyms meaning perceptible by touch, concrete, or physically real. Both fit the blank and produce equivalent meanings.


Why the others are incorrect:
B. fleeting and D. transient - These mean short-lived or temporary. They describe the digital image, not the printed photograph.
C. permanent - While a printed photograph is indeed lasting, there is no paired synonym in the list to satisfy the "Two Answers" requirement. Also, the passage emphasizes physical presence (touch) over mere duration.
F. mutable - Means changeable; this is unrelated to the contrast being drawn.