An old house was torn down. Small plants and grasses grew in a vacant lot. Over the next few years, bushes and tree seedlings began to grow is this primary or secondary ?

What can be said about farmers in highly developed countries? a) they have little or no negative impact on the environment. b) they practice subsistence agriculture. c) they are able to incorporate polyculture into their farming practices. d) they utilize organic farming techniques on a regular basis. e) they rely on large amounts of energy from fossil fuels.

Awolf pack hunts,kills, and feeds on a moose. in this interactions, the moose is a?

49 ! how are energy cycles and growth cycles related?