Answer: B)
Explanation: I have found the options that are missing in your question.
A. No aphids, sowbugs, snails, or cutworms are in her garden.
B. The Salinas Valley is covered by fog, making it a closed pot.
C. The story takes place in December when there is little work to do on the ranch.
D. Elisa's garden is located too far from the house.
The best aspect that is showing Elisa's feeling of loneliness is a valley that is covered by fog. For is the motif that is showing us something unpredictable and scary because we don't know what will happen next. Fog is giving us the sense that we can't see what is around us and because of that, Elisa can't see anything which is referring to her loneliness. Fog usually comes out of nowhere, without warning and predictions.