Which of the following are sustainable land-use strategies for minimizing the impacts of urbanization?
1. Reducing native plant landscaping in a city's center
II. Building high-rise business centers in a city's center
III. Providing affordable housing options in a city's center

1. beginning with all chambers of the heart in the "relaxed" phase, describe the cardiac cycle in mammals, with systole and diastole of the atria and ventricles. for each time point in the cycle you select, state the following: • whether the atria and ventricles are contracting or relaxing • whether the av valves and semilunar valves are closed or open • whether the pressure in the atria and ventricles is high or low