how is food broken down in the stomach? explain

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.

Crossing over is a method of (blank)?

Why do mountaineers become breathless as they reach high altitudes