Questions

Since the Display Network considers broad match only, plurals, misspellings, and other variants are unnecessary.

Magnetism in materials is due to circular motion of electrons.

We know that, 

Earth is known as Watery planet.

Neptune is known as Blue planet. 

Thermoset, or thermosetting, plastics are synthetic materials that strengthen during being heated, but cannot be successfully remouldedor reheated after their initial heat-forming. This contrasts withthermoplastics, which soften when heated and harden and strengthen after cooling. Thermoplastics can be heated, shaped and cooled as often as necessary without causing a chemical change, while thermosetting plastics will burn when heated after the initial moulding.

The study of volcanoes, lava, magma, and related geological, geophysical and geochemical phenomenas is called Volcanology.

Answer:  T

Explanation:   In each row, add together the numerical values of the pairs of letters to the left and right, then calculate their difference, putting the letter with this numerical value in the centre space.