Usually form superficial skin infections only A. Bacteria
Intestinal muscles and heart muscles are involuntary muscles,hand muscles and neck muscles are voluntary muscles
B. Healthier ecosystems. If you're talking about benefits, this is the only positive on this list. The others are listing the difficulties or downsides.
The correct answer is B!
Why is this?
A mineral is a naturally occurring, inorganic solid with a definite crystalline structure and chemical composition. All minerals contain one or more elements, which are pure substances that cannot be broken down into simpler substances by chemical means.
