What is land pollution?

Question

$\begin{array}{1 1} (a)\; \text{This is the contamination of the environment with bad toxic,chemical and waste} \\ (b)\; \text{contamination of one’s home} \\ (c)\; \text{growing of trees and cutting them down} \\ (d)\; \text{cutting down of trees and using for furniture purposes} \end{array}$