Which environmental changes occur fastest

Assuming you have multiple choices... According to the internet, this question is a multiple choice question.

Here are following answers.

"The environmental change that occurs faster is definitely volcanic eruption. It may happen in an instant and destroy everything in its way, whereas the process of regrowth of forest after volcanic eruption is a slow one."

Oil spills may also have the fastest occurring changes in the environment.

Quoted answers are NOT Mine! All credits reserved to the owners:

@WorldlyGlass49 and @Avery123  

Volcanic eruption I assume that's one of your answers (please mark brainliest!)

Heat capacity = mcδtheat capacity = 2.676×10^3 j ..the heat capacity given is for 7.00 g of kcn,potassium cyanide which is equal to 0. mole of mole = mass  ÷ mr of kcn is 7  ÷ 65 =0.therefore: 0. of kcn liberates 2.676×10^3 j of heat1 mole   (2.676×10^3    ÷  0.107 )  × 1 =do the calculation to obtain 25009 j = 25kj