Best practice for reusable symbols: When creating a new block, the drafter should draw the geometry on Layer 0 so that, when inserted, the block inherits the color/linetype of the target layer. Decide whether this recommendation is correct.

Introduction / Context:
Layering strategy is crucial for predictable graphics. In AutoCAD, objects drawn on Layer 0 and set to ByLayer for color/linetype allow blocks to adopt the properties of the layer on which they are inserted. This question checks your awareness of the Layer 0 convention for portable, standards-compliant blocks.

Given Data / Assumptions:

• Block will be reused across multiple drawings and layers.
• Properties such as color and linetype should match the host layer.
• No special sublayering requirements exist for complex components.

Concept / Approach:
Layer 0 acts as a neutral layer for block definitions. If all internal entities are ByLayer on Layer 0, the inserted block takes on the destination layer's properties. This supports consistent graphics without editing the block definition for each project. Exceptions exist for multi-layer blocks (e.g., door swings vs frames), but the base rule remains widely used.

Step-by-Step Solution:
1) Set current layer to 0 before drawing block geometry.2) Ensure entity properties are ByLayer and ByBlock as appropriate.3) Define the block with a sensible base point.4) Insert the block on the target layer; verify inherited properties.

Verification / Alternative check:
Insert the same block on different layers with different colors; the appearance updates automatically when the definition was built on Layer 0 with ByLayer settings.

Why Other Options Are Wrong:
Defpoints is for dimensions and should not plot; using it for blocks causes plotting issues.Forcing unique internal layers defeats the purpose of inheritance unless intentionally designed.

Common Pitfalls:
Hard-coding colors or linetypes inside the block; forgetting to purge stray layers; inconsistent base points leading to awkward placement.

Final Answer:
Correct