It is correct to speak of these rings of growth as Annual rings,@ for as long as the tree is growing healthily a ring is formed each year.
(It; is; correct to speak of these rings of growth as Annual rings) (the tree; is growing; healthily) (a ring; is formed; T:each year)
It the tree a ring
is is growing is formed
correct to speak of these rings of growth as Annual rings
healthily
T:each year