Final answer:
The sentence that suggests naivety in a soldier is 'Henry was easily deceived by the enemy's tactics,' implying Henry's inexperience and inability to anticipate enemy strategies.
Step-by-step explanation:
The sentence that best portrays Henry as a naïve soldier is: Henry was easily deceived by the enemy's tactics. This sentence suggests that Henry lacked experience and was not prepared for the strategies employed by the enemy. Being naïve in a military context often means a soldier is inexperienced or lacks the skepticism needed to anticipate and counteract enemy plans, which is a key component of military strategy and effectiveness on the battlefield.
A naïve soldier might believe that their own competence or bravery is enough to win wars, not understanding that warfare is heavily mechanized and often outcomes are not strictly due to personal heroism. This is highlighted by the technology of warfare and how soldiers discovered that skill or bravery mattered little in the face of arbitrary death by artillery or orders to "go over the top" in trench warfare.