To solve this question, we need to correctly match each term from List - I with its corresponding concept in List - II. Let's go through each term and its likely match:

1. Endowment: This term is often related to natural abilities or characteristics that a person is born with. In terms of physical characteristics, it closely matches with Stature (iii), which implies the natural build or physical structure of a person.
2. Endurance: This is a measure of a person's physical capability to sustain prolonged physical or mental effort. In physiological terms, it is often related to VO₂max (iv), a metric that indicates the maximum rate of oxygen consumption measured during incremental exercise, reflecting a person's aerobic endurance capacity.
3. Environment: This typically refers to the surroundings or conditions in which a person lives or operates. It can impact various biological processes, making T.C.A. Cycle (ii) a relevant match because the cycle is an integral biochemical pathway involved in cellular respiration, which is influenced by environmental conditions.
4. Energy: This term relates to the capacity to do work and is closely related to Acclimatization (i), as acclimatization involves physiological adjustments that improve energy efficiency in response to environmental changes.

Based on the logical connections outlined above, the correct matching of List - I and List - II is:

• (a) Endowment - (iii) Stature
• (b) Endurance - (iv) VO₂max
• (c) Environment - (ii) T.C.A. Cycle
• (d) Energy - (i) Acclimatization

Therefore, the correct answer is: a-(iii), b-(iv), c-(ii), d-(i)