What is the state of maintaining a stable internal environment despite chnging external conditions

Plz plz plz quick! 49 points for whoever which of the following statements about greenhouse effect is true? *life on earth is suffering because of greenhouse effect *the greenhouse effect is caused by human activity *all greenhouse gases are harmful *life on earth would not exist without the greenhouse effect

Answer now! good pts and a brainliest potatoes are what im like a potatoe irdk have a good day

Use the distance formula to determine weather each pair of segments have the same length