2. Why is CO2 important?

Could someone me find the answer to this problem.

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

This chart shows characteristics of three different types of waves. which statement is best supported by the information in the chart? wave x and wave y are mechanical waves, and wave z is an electromagnetic wave. wave x and wave y are electromagnetic waves, and wave z is a mechanical wave. wave x and wave z are electromagnetic waves, and wave y is a mechanical wave. wave x and wave z are mechanical waves, and wave y is an electromagnetic wave.