Final answer:
Lee might have thought Longstreet favored defensive tactics because they provided strategic advantages given the advancements in military technology and were in line with the Confederacy's goals.
Step-by-step explanation:
General Robert E. Lee may have believed that General James Longstreet favored defensive tactics because of Longstreet's understanding of warfare during the Civil War era.
Knowing the advancement in weaponry and military technology, Longstreet might have surmised that defensive positions offered a greater advantage and higher likelihood of inflicting significant casualties on the attacker while conserving his own forces.
Additionally, Longstreet could have recognized that defensive tactics aligned with the strategic goals of the Confederacy to maintain their territory and wear down the Union's will to fight.