Option 1 -> Forms: "When animals in the forest get wounded, they find a place to lie down and they rest completely for many days without thinking about food or anything else." - Logical and grammatically correct.
Option 2 -> Starts with "Completely for many days without..." which cannot begin a sentence meaningfully.
Option 3 -> Creates a fragmented structure with "without when animals" - grammatically incorrect.
Option 4 -> Ends with "completely for many days without" leaving the sentence incomplete and meaningless.
Hence, Option 1: (D), (B), (A), (C) -> This arrangement creates a coherent sentence describing how wounded forest animals instinctively rest without eating during recovery, with the subordinate clause (D) properly introducing the main clause (B), followed by the manner of resting (A, C) -> correct