Final answer:
Yana is engaged in academic writing.
Step-by-step explanation:
The situation that could describe Yana's activities in the computer lab is option d. Yana is engaged in academic writing.
Yana is in the computer lab writing a paper for her history class. The graph represents the number of words Yana had written after a number of minutes. Since Yana is writing a paper, it aligns with the activity of academic writing. Yana is not playing video games, designing a website, or learning to program.