"Why does a fresh water body, when cooled, start <span>freezing from the surface downward" would be the best question since this would explain all the difference processes. </span>
D) The Tuolumne and Merced groves near Yosemite, the Dinky Creek grove, those of the General Grant National Park and the Sequoia National Park, with several outstanding groves that are nameless on the Kings, Kaweah, and Tule river basins, and included in the Sierra forest reservation, have of late years been partially protected by the Federal Government; while the well-known Mariposa Grove has long been guarded by the State.
B. Compound Sentence. Hope this helps you!
