Cell membrane allows some material to pass through it while on the same time it blocks other material from entering through it
The two biggest reasons for children spending less time outside are the development of technology and the safety issues. The development of technology brought in our homes countless forms of having fun which is very important to children. The mobile phones, PC's, laptop's, tablets, Sony Play Station, as well as lots of technologically improved toys, made the children stay at home since they have the fun indoors, and not be interested in going outside and in nature. Also the safety issues in lots of parts in the world made the parents to restrict the children to the indoors environment.
This is an example le of commensalism.The burdock seeds benefit and the cow is unharmed.
The answer is E. none of the above.
Fam stop asking questions and learn from google
