Answer:
First two rings are thicker while the last two rings are thinner.
Explanation:
Due to the first two years of optimal growing conditions received by the tree, the width of trunk of the tree is thicker but due to drought conditions experienced by the tree during the most recent two years, there is very little increase occur in the width of the trunk because the tree is in stress condition and for that reason the ring of trunk is thinner as compared to first two years.
Geothermal power plants generate the least amount of pollution.
Yes i think i mean there both horses right? im sorry if you dont get this right
Answer: I agree with Camila because a lot of waves go through matter, but not all waves do like Electromagnetic waves is one of them. Not all waves need matter. :D