41. Which action illustrates citizen participation in an international organization? A. Samantha teaches others about the history of the United Nations (UN). B. Jada volunteers to help raise funds for the United Nations Children's Fund (UNICEF). C. Ethan writes a report on the origins of the North Atlantic Treaty Organization (NATO). D. David reads the annual report published by the World Trade Organization (WTO).​

The diagram illustrates the activity of vesicles during a cellular process.

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. label the following topographic map. click on a label below the map to select it, and then click on the appropriate box on the map to place the label. (increments for contour lines is 50 ft).

What substance acts to prevent sudden ph changes in bodily fluids?