Use the drop-down menus to match each example to the fossil topic discussed, then to show how the fossil record gives evidence of evolution.

i won't lie i don't know so go online and ask google thats what i do

1. is geographic distribution

2 is increasing complexity

3 is transitional forms

idk

explanation:

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.