Your teacher takes a candle and cuts some wax from the bottom of it. She puts the bit of wax in a beaker and places it on a hot plate. Eventually, the wax melts and becomes liquid. Do you think this is a physical or chemical change?

artificial selection

explanation:

this occur when man select base on their intelligent

producers within ecosystems are essential as they are at the base of the food chain. plants are examples of producers. they use the process of photosynthesis to capture light energy and use it to convert simple inorganic substances (carbon dioxide and water) into organic substances (glucose).