This is a survival technique where an organism, usually a plant, is capable of directed physical movement or growth in response to a specific stimulus; such as light, gravity, water, or contact.

what is the survival technique described above that is used by plants?
a) locomotion
b) migration
c) pseudopodia
d) tropism

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;

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.