At every depth, soil composition remains the same.
O
True
O False

false. there is the surface soil, which has a lot of partly decayed stuff, topsoil, which has minerals and organic material, subsoil, which is made from sand, silt, and clay that hasn't been broken down, and parent material, which is the place where not much living things live in, except for gigantic tree roots. then there is the bedrock, which is; you guessed it:rock entirely.

Explanation:

here's the link to your question!

explanation:

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.