Stable elements are those which have atleast one isotope with no tendency to "decay", i.e., change into anotherelement.
Answer:
25%
Explanation:
adenine and thymine are base pairs so there will be an equal amount of adenine to thymine.
I believe it is a. Birds typically migrate in the wintertime to escape harsher climates to places that have more food. Also, some birds migrate to certain places when they are about to start their nesting and breeding seasons.