Detailed Explanation:

Answer: Option 1 — 1 only

In January (Northern Hemisphere winter), continents cool down faster than oceans due to differential heating. This causes isotherms to deviate northward over the warmer oceans and southward over the colder continents. Statement 2 is incorrect because the Gulf Stream and North Atlantic Drift are warm ocean currents, not cold, and they actually make the North Atlantic warmer, causing isotherms to bend northward.

✅ Statement 1 (Isotherm Deviation) – Correct: In January, isotherms deviate northward over oceans (which remain warmer) and southward over continents (which are colder) in the Northern Hemisphere due to differential heating and cooling rates of land and water.

❌ Statement 2 (Gulf Stream and North Atlantic Drift) – Incorrect: The Gulf Stream and North Atlantic Drift are warm ocean currents, not cold; they carry warm tropical water northward, making the North Atlantic relatively warmer and causing isotherms to bend northward, not making it colder.

📝 Short Notes: Isotherms and Ocean Currents

• Isotherms: Lines on a map connecting points of equal temperature, used to understand temperature distribution patterns across different regions and seasons.
• January Isotherm Pattern (Northern Hemisphere): During winter, continents are colder than oceans because land loses heat faster than water. Isotherms bend equatorward (southward) over continents and poleward (northward) over oceans.
• July Isotherm Pattern (Northern Hemisphere): During summer, continents are warmer than oceans. Isotherms bend poleward (northward) over continents and equatorward (southward) over oceans.
• Gulf Stream: A powerful warm ocean current originating in the Gulf of Mexico, flowing along the eastern coast of North America and across the Atlantic towards Europe, significantly warming Western Europe's climate.
• North Atlantic Drift: The extension of the Gulf Stream that continues eastward across the North Atlantic, bringing warm water and mild temperatures to Northwestern Europe, including the British Isles and Scandinavia.
• Effect of Ocean Currents on Isotherms: Warm currents like the Gulf Stream cause isotherms to bend poleward (northward in Northern Hemisphere), while cold currents like the Labrador Current cause isotherms to bend equatorward (southward in Northern Hemisphere).
• Differential Heating: Water has a higher specific heat capacity than land, meaning oceans heat up and cool down more slowly than continents, creating seasonal temperature contrasts that influence isotherm patterns.