Which one of the following pairs of volcano and location is not correctly matched in world geography?

Introduction / Context:
Matching important volcanoes with their correct locations is a standard question type in world geography. This problem asks for the pair that is not correctly matched, so we must identify which volcano has been placed in the wrong region. Knowing at least one or two facts about each name is enough to answer such questions.

Given Data / Assumptions:

• Four volcano location pairs are provided.
• Only one pair is incorrect.
• We must identify the mismatched pair.

Concept / Approach:
We check each pair one by one. Ol Doinyo Lengai is a volcano located in northern Tanzania in East Africa. Poas, often written as Poas Volcano, is an active volcano in Costa Rica in Central America. Mount Klyuchevskaya, also called Klyuchevskaya Sopka, is a volcano on the Kamchatka Peninsula in Russia. Mount Egmont, now more commonly known as Mount Taranaki, is a volcanic peak in New Zealand, not in Hawaii. Therefore the pair that lists Mount Egmont as being in Hawaii is incorrect.

Step-by-Step Solution:
Step 1: Evaluate the pair Ol Doinyo Lengai : Northern Tanzania and recall that this mountain is indeed in Tanzania in the East African Rift Valley.Step 2: Evaluate Volcano Poas : Costa Rica and note that Poas is a well known Costa Rican volcano.Step 3: Evaluate Mount Klyuchevskaya : Kamchatka Peninsula and confirm that Klyuchevskaya is a major active volcano on the Kamchatka Peninsula in Russia.Step 4: Evaluate Mount Egmont : Hawaii and remember that Mount Egmont or Mount Taranaki is actually in New Zealand, not in Hawaii.Step 5: Conclude that Mount Egmont : Hawaii is the incorrectly matched pair.

Verification / Alternative check:
Even if a learner is unsure of all pairs, knowing that Hawaii main volcanoes include Mauna Loa, Mauna Kea, and Kilauea, but not Mount Egmont, is enough to question the accuracy of the Mount Egmont : Hawaii pair. A brief mental map placing Taranaki on New Zealand North Island further confirms that this pair is wrong.

Why Other Options Are Wrong:
The other options are correctly matched and therefore are not correct answers for this particular question. Ol Doinyo Lengai is indeed in northern Tanzania, Poas is in Costa Rica, and Mount Klyuchevskaya is on the Kamchatka Peninsula. They are valid volcano location pairs, so selecting any of them would not satisfy the requirement of finding the mismatched pair.

Common Pitfalls:
Some students may be unfamiliar with lesser known volcano names and guess randomly. Others may confuse Mount Egmont with volcanoes in the Pacific region more generally and mistakenly accept Hawaii as correct. Building a mental list of a few volcano and country pairs helps reduce such guessing errors.

Final Answer:
The volcano location pair that is not correctly matched is Mount Egmont : Hawaii, since Mount Egmont is actually in New Zealand.