Apple introduced the Live Photo feature way with iPhone 6S in their iOS9. Live Photo idea was that each time you take a photo, your phone will capture a few seconds of video along with sound and all of that is sent when you share your photo. This of course can sometimes be really bad when some not wanted audio gets recorded in the background.
Since the feature was introduced it has been set as the default option when taking pictures so each time you snap one you just capture a small amount of video and audio along. Good thing is that this feature can be turned off and the even better news is that you can edit your old photos to remove back video and audio.
How to share only photo
You can keep your Live Photos but share only a single still typical photo if you wish. Go to the photos app on your phone and select the photo you wish to share. Press the Share button on the bottom left part of the screen and once the Share menu appears tap on the Live button in the upper left corner of the selected photo. The button should turn grey and become slashed and now you can share only still photo. This is only temporary for this one specific share so next time you want to do this you will have to go through the process again.
How to disable Live Photo
If you are not happy with the previous solution and really do not want to turn off the Live feature each time you want to share a photo or you just simply do not want the feature at all there is way to turn if off for good. Take note that you can temporarily not use this feature just by opening the camera, switching to photo mode, and then tapping on the Live photo button on the toolbar that looks like three circles one inside another. This will temporarily turn the Live Photo feature for this session but next time when you open the camera by default it will be turned on again. This is a good approach if you want the feature but sometimes you just want not to use it.
In order to turn it off completely go to the settings of your phone and go to Camera and then preserve settings. inside the preserve setting turn the switch Live Photo to ON position, now go-to camera and again click on the live photo button to turn it off but this time setting will be saved and next time you open the camera it will not be ON.
Editing old Live Photos
As stated before you can edit your old pictures in order to make them stills. You can edit them to remove audio only but keep the video part, or you can completely remove everything and convert them into typical still images.
In order to only remove audio from your Live Photos go to pictures and select one that you wish to change, click on edit, and inside edit tap on the Live Photo icon (three circles). Next tap on the audio icon located in the top left corner of your screen and it will change into the mute icon. Click on done and you are finished.
To completely remove the Live photo go to Photos, select picture, click on edit and select the live photo button again. This time tap and hold the Live button next to the sound until it turns gray with a strike through it. Click on done and you are finished.