What is a main difference between primary succession and secondary succession? A. Primary succession happens slowly, and secondary succession happens rapidly.
B. Small plants grow first during primary succession, while large trees grow first during
secondary succession.
C. Primary succession occurs after a natural disaster, and secondary succession occurs
before a natural disaster.
D. Primary succession is the colonization of new sites, and secondary succession is
colonization of previously inhabited sites.

idk what the options are but

these is a strong electrostatic attraction between the ions hence a lot of energy is needed to overcome this attraction

this is why the boiling points are so high

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.

yes

explanation

they do and it slaps