This photograph shows a protion of the Monahans Sandhills in northwest Texas. Monahans Sandhills are noted for their sand dunes that can be up to 21 m (70 feet) high. The Monahans Sandhills are part of a semi-arid ecosystem that received 310 mm (21 inches) of rain on average per year. Another picture of the same area taken weeks before shows that the shape and location of some sand dunes have changed. Which of these most likely caused the changes in the dunes?

A. mechanical weathering of rocks

B. wind erosion of sand particles

C. water deposition of pebbles

D. chemical weathering of the rocks

b exhibiting favoritism toward the kikuyu people.

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.

answer;

c. a tree whose roots are surrounded by wet sand.

explanation;

water stress is an important factor limiting the growth and productivity of forests.water stress is the most often cited cause of poor survival and growth of woody landscape plants.

-insufficient soil moisture is the most common form of water stress, but excess moisture that leads to poor soil aeration (hypoxia) can also result in reduced plant vitality. a tree whose roots are surrounded by wet sand would be least likely to experience water stress.