Based on the population pyramid above, which of the following will pose the greatest demographic challengeto China beginning in 2029?

Ithink it’s true as the answer.

Here is a picture  of the net. its 4 squares in a row diagonal and on the third draw one square aove and under

Answermost of the time it would be ground into fine sediment,and sometimes they are carried away from the original location;

Aeolian processes,  pertain to  wind  activity in the study of  geology  and  weather  and specifically to the wind's ability to shape the surface of the  earth  (or other  planets). winds may  erode, transport, and deposit materials and are effective agents in regions with sparse  vegetation, a lack of soil moisture and a large supply of unconsolidated  sediments. although water is a much more powerful eroding force than wind, aeolian processes are important in arid environments such as  deserts