Fill in the blanks using the correct tense of the verbs given in brackets. The earth _____(move) round the sun. 

Moves (correct tense): In this context, the present simple tense "moves" is appropriate as it describes a general, timeless fact about the Earth's motion around the sun. Options:   (a) Has moved: This is the present perfect tense, suggesting a completed action. It is not suitable for describing the ongoing, continuous motion of the Earth. (b) Was moving: This is the past continuous tense and is not suitable for stating a general truth or fact. (c) Moves: This is the correct present simple tense, indicating the ongoing and continuous motion of the Earth. (d) Had moved: This is the past perfect tense, suggesting a completed action before another past action. It is not suitable for describing the current state or regular motion.