Answer:
Option A 0% seems to be the answer
Explanation:
if not B then A
C planting trees. It adds oxygen
Explanation:
it depends on Which nutrients the body lacks l.however,there are some general symptoms you might experience.they include l:pallor,fatigue, depression,weakness,trouble breathing,unusual food craving,hair loss, constipation,etc
I just had this answer but it hasn't been graded. I put 1. Meteor impacts, 2. volcanic gases and 5. Milankovitch cycles. I didn't put earthquakes because I wouldn't think it would affect the climate changing since they just affect ground movement.
During the Silurian Period, simple PLANTS began too grow on land and in damp trees