Analogy — Map larger-to-smaller within the same domain: Mountain : Hill :: Tree : ?

Introduction / Context:
The first pair contrasts a larger landform (mountain) with a smaller similar landform (hill). We must pick the plant form that is to a tree as a hill is to a mountain: a smaller, similar class within the same domain.

Given Data / Assumptions:

• Mountain vs hill: same kind, different scale.
• Tree vs shrub: same botanical domain; shrub is smaller than a tree.
• Other options represent part, environment, or grouping.

Concept / Approach:
Preserve “same-kind, smaller scale.” Avoid part–whole (leaf), collective (forest), or unrelated context (ground).

Step-by-Step Solution:
Mountain → hill (smaller analogue).Tree → ? → shrub (smaller analogue).

Verification / Alternative check:
Taxonomies in geography and botany both frame these as size/structure variants within the same class.

Why Other Options Are Wrong:
(a) Ground – environment, not class variant.
(b) Leaf – part of a tree, not a smaller tree-like organism.
(c) Forest – collection of trees, not smaller version.

Common Pitfalls:
Picking part or collective terms instead of a comparable class on a reduced scale.

Final Answer:
Shrub