3. Circle the letter of each sentence that is true about water's surface tension. A it helps some insects "walk across the surface of the water
B. It refers to the tightness across the surface of the water
C. it is caused by polar molecules repelling each other
D. it causes raindrops to form round beads

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the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers