It is the last one if more eggs are produced by chickens they will lose more weight
The trees dont take in co2 cause there are none cutting off the oxygen cycle
Non living things like mountains,oxygen,water.etc
Well to begin with this process is called genetic engineering, the scientists altered the DNA of the chickens instead of altering a protein already in the chickens because when you alter the DNA the offsprings of the chicken will will have the same qualities while if you only alter the protein already in that chicken only that chicken will be able to do the job
