Flock X Flock Y Flock Z Total Pieces of Food Eaten 32 180 88 Food Percentage* % % % Simulated Number of Birds in Flock for 3rd Generation** * Divide each flock's total pieces of food by 300, the total number of pieces of food eaten. ** Multiply the food percentage for each flock by the total number of birds (30).

this is a good question! i'll do some research and come back when i have the answer!

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.