The first and the most important thing is vocabulary. For writing you should know a lot of synonyms to avoid tautology and also be a specialist in the field, which you are writing about, a person should be an expert or otherwise all the texts will be primitive and uninteresting.
Also person should have good imagination and abstract thinking, it can be developed by reading books.
And, of course, knowledge or the grammar and punctuation. That doesn't even need an explanation.
Attached is a link to a page with Common Core writing standards as per age level. This will guide you for all ages. http://www.corestandards.org/ELA-Literacy/WHST/6-8/#CCSS.ELA-Literacy.WHST.6-8.1
gradually improving cognitive abilities
recruitment
I think so. It expresses artistic abilities.
There are many factors that affect the communication skills, abilities and development of individuals. Some of them include environment, exposure, society and so much more.
cause animals differ from humans and they have different abilities and their abilities are based on their medical research
it depends on the subject, grade level, and student learning abilities and is useful in many situation.
used as tools in school placement, in determining the presence of a learning disability or a developmental delay, in identifying giftedness, and in tracking intellectual development.
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Katenado la Winletti
development.
Human resource development aids in the improvement an employee's personal and organizational skills, knowledge and abilities. It includes opportunities such as employee training, employee career development, performance management and development, coaching and mentoring.