Answer:
the lens loses its ability to change shape readily
Answer:
<u><em>fixed-ratio</em></u><em>; </em><u><em>variable-ratio
</em></u>
Explanation:
The fixed ratio is a reinforcement method. <em>Reinforcement is given in this method after a number of responses have been completed. </em>
<em>The number of responses expected continues to be constant.</em>
A variable-ratio schedule is a reinforcement schedule where an unknown number of responses reinforce the response. <em>This routine produces a reliable, high response rate. </em>
<em>Betting and casino activities are great examples of a payout dependent on a schedule for a variable ratio.</em>
I believe the answer to your question is external stimuli
The answers is a. A rash b. A skin infection d. A common skin condition e.skin inflammation
the answer is c, you need to identify how you react to stress first. hope this helps