The following arguments explain the given statement
(i) The statement highlights the importance of the human resource.
(a) It is the.people who develop the economy and society.
(b) It is the people who make and use resources.
(c) Resources have no meaning without people, e.g. coal is just a piece of rock until people were able to make it usable.
(ii) Natural events like a river flood or Tsunami
become a ‘disaster’ only when they affect a crowded setdement.
(iii) Population is the pivotal element from which the significance is derived.
Thus, resources, calamities and disasters are all meaningful only in relation to human beings.