kaila is treating patient at scene of an automobile accident and she is having difficulty in hearing patient's voice due to police sirens, so such kind of communication barrier that which could be either environmental or natural condition that does not allow the transfer of message from one person to the other is called 'physical barrier'.
Physical barriers do not allow the communication to be effective. Hearing problems due to thunders, sirens, call disconnection, message not sending all come under physical barriers.
D.) <span>Both factors would decrease blood pressure. </span><span> When dilation occurs, area increases, thus decreasing pressure & when amount of water/ion decreases it also causes decreases in pressure.
It's the only answer thats a place with official jobs. A normal farm would be there too, but a backyard farm is someones hobby and not a paying occupation, so OSHA isn't in charge of that.