write a note on abu rehan al barium? ibn-e-battuta, marco polo, vasco da gama, christopher columbus?

For 50 pointsfredrika's science teacher asked her to bring in three abiotic items from her backyard ecosystem. which of the following groups of items should she bring? a. a lightning bug, a plug of grass, and a wormb. a smooth rock, some red dirt, and an empty bird's nestc. a ladybug, a spider, and some water from a mud puddled. a caterpillar, a pine cone, and a piece of a robin's egg

Open opinion / / / if a juvenile committed murder, should the juvenile be in prison for life or be free and seek instead? which and why?

The pka of three different c―h bonds is given below. explain the observed trend in pka. select the single best answer.