The predominant plants found in the savanna are grasses, and there are only a few isolated or small clusters of trees. Which abiotic factor helps to maintain the savanna as a grassland rather than a forest? A Loose Soil
B Abundant rainfall
C warm temperatures
D lightning Fires
PLEASE HELP

answer; i believe the answer is hydraulic action;

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )