(1) earth's crust is made up of relatively rigid plates that ride atop earth's hot, semiliquid mantle. (2) the plates are called tectonic because they're in constant motion. (3) they can move because earth's mantle is a very hot and semiliquid fluid called magma. (4) volcanoes are a result of magma rising up or erupting through a plate, particularly where plate boundaries are moving against each other. (5) also, when plates slide against each other, causing friction along adjacent plate boundaries, earthquakes frequently occur. (6) therefore, we often find volcanoes and earthquakes along plate boundaries. (7) plates may also collide. (8) when that happens, mountain ranges are formed. (9) for example, the collision of the plate carrying the indian subcontinent created the himalayan mountains when it collided with the asian plate. 11. which sentence in this passage introduces a new topic that might begin a new paragraph? a. sentence 5 b. sentence 6 c. sentence 7 d. sentence 4

Read this student's rough draft. i know it doesn't sound like much, but am psyched about the school fundraiser this spring. we are sponsoring a slam-dunk contest (on an eight-foot rim) for local middle schoolers. we're charging an entry fee for participants that will cover our costs, and we’ll charge admission at the door! three dollars per person—ka-ching! six of my neighbors have already said they are coming. i mean, who wouldn't come? participants will wear their school jerseys, and all their friends will come to cheer! which concluding sentence best reflects the writer's voice? the contest will take place in the liberty middle school gym, and the maximum capacity is 250 spectators. the contest promises to enrich our community as a variety of schools unite to support our fundraising effort. it will be sweet, because the band is providing music in the stands, and the dance squad is performing. students’ enthusiasm for this endeavor has blossomed, and it will reach full flower as the contest approaches