Final answer:
The statement regarding Lincoln's declaration of the war's purpose is false; originally, the Civil War was fought to preserve the Union. The statement about the types of interference being constructive and destructive is true. The Reconquista as a military and religious action is also true.
Step-by-step explanation:
Understanding True or False History Statements
Assessing the validity of historical statements is essential for understanding the complex tapestry of past events. When examining the statement about Lincoln's declaration of the war's purpose, it is false that he announced the war was exclusively to free enslaved people at the outset; his initial stance focused on preserving the Union. Later, the emancipation of slaves became an explicit war aim.
In relation to the two types of interference, it is indeed true that constructive and destructive interferences are the two categories that describe the ways in which waves can interact with each other.
Reviewing the historical context of the Reconquista, it is true that for the Spanish, reconquering the Iberian Peninsula from Moorish rule was a campaign characterized by both military and religious objectives, reflecting the intertwined nature of political power and religious belief.