Some are for abuse or tooken to increase performance or stabilize someone
Natural barriers include the skin, mucous membranes, tears, earwax, mucus, and stomach acid.
Condoms
vaccines
controlled rooms of sick/affected people
Sodium, because of the amount it can cause harm to the hypertensive, people suffering from renal and cardiovascular diseases ... Depending on the reservoir source, the pH can also vary, the water bottles need to identify the minerals and components for the consumer to be aware of what he's drinking
Answer:
Abuse Can affect people in many ways. But also depending on how bad is it. some people dont notice right away for many reasons. These may include that She/he Maybe decides to keep that to himself. he decides to forget everything that´s going on and continue with his life and not wanting help from others. He´s scared that if she/he speaks They may get punished or are afraid that no one can help and fix the situaiton. They also decide to fake their happines by smiling to much, by telling everyone that their fine when they really arent. Its very hard to identify who´s depressed and who´s being abuse because both people who suffer from it they intend to stay away from it and not let anyone know how they feel. They decide to keep doing what they love even though they dont feel happy about it. Every person who may suffer from it can be hard to identify they are being abused for the same reasons. They fake who they are... and decide not to cause problems
Explanation: I hope this helped lol :)