Which of these materials typically make up the a horizon in soil?
a. silt and pebbles
b. sand, silt, and clay
c. sand, silt, and pebbles
d. sand, clay, and pebbles

"Sand, silt and clay" are the materials among the following choices given in the question that typically make up the A horizon in soil. The correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer that has actually come to your help.

The answer is b or dmost likely bhope it