Answer:
You can solve drainage problems and create an attractive landscape feature at the same time with a dry creek bed. Build a creek bed to direct water away from a low spot in your yard. Or if the slope of the ground permits it, use a creek bed to drain a low spot.
This is heavily disputed, and honestly, it varies on a person-by-person basis. Some people are visual learners (so it's effective for them to use videos and pictures to help them study), some prefer being hands-on, etc...
Generally though, I'd say the most effective method that works for most people is through visceralisation. This is the process of associating concepts, words. phrases etc. with your different senses (sound, touch, images...). You can read up more on it by searching up "visceralisation for studying".
Skin color would be a good indicator...
Answer:
cell membrane aka membrane
Factors that could hamper effective communication would be staying in the past, talking only about one aspect of the situation, not being prepared to think about a situation in a new light, not considering all the possibilities which might help in a current situation, and many others. These were just five ones which are highly harmful when one wants to be effective in communication.