It letter D. light-electromechanical sound-
Answer:
The tibia completes growth at about age 16 or 17 in girls, and 18 or 19 in boys. For toddlers to teenagers up to age 21, teeth are the most accurate age indicators
Explanation:
<span>Marine ecosystems like lakes and oceans have aphotic zones. Aphotic
zones refer to the zones in the water where there is little or no sunlight. It
is found in bodies of water were depths only receive less than 1% of sunlight
penetrations. Bioluminescence is essentially the only light found in this zone
and most food comes from dead organisms that sink at the bottom of lakes or
oceans. Seasons of the year affect the depths of aphotic zone as well as the
water’s turbidity. The opposite of the aphotic zone is the photic zone, where
portions of the marine ecosystem are directly affected by sunlight. </span>
