Final answer:
The father's idea that Julianna should look at the whole landscape relates to the painting's emphasis on capturing a broader perspective.
Step-by-step explanation:
The father’s idea that Julianna “needed to start looking at the whole landscape” is related to his description of a painting in lines 46 through 49 because both emphasize the importance of taking a broader perspective. In the painting, the artist intends to project clarity and insight by capturing the depth and distance of the horizon, the play of light and shadow, and the relationships of colors and elements in the work. Similarly, the father wants Julianna to consider the bigger picture, to see beyond the immediate details, and to gain a deeper understanding of the world around her.