Which of the following task constraints makes catching more difficult for young children?

a. a flat trajectory as opposed to a high trajectory
b. varying the speed of the ball to be caught from throw to throw as opposed to keeping the speed constant
c. moving a short distance to intercept the ball as opposed to moving a longer distance
d. a and c
e. b and c

B. varying the speed of the ball to be caught as opposed to keeping the speed constant  

Explanation:

Children's cognitive development is the development of the brain which processes cognitive skill such as to do mental task and calculations, logical thinking and reasoning, processing speed as well as visual processing. The cognitive skills of a child is well established after 5 years of age duration.

Task constraints consists of those goals and tasks that include motor skill.

In the context, for catching task, young children will find it difficult to catch a ball with varying speed as compared to the ball with a constant speed. This is because the cognitive skills are not fully developed  in young children and it causes difficulties in motor skills. The children are not able to process the speed of the ball.

Hence the correct option is (B).

a family can go through many changes which would make it complex. having children can cause a change and increase the complexity. this would change the distribution of authority and management, as the older siblings will at some point be in charge of the younger ones, and discipline must be distributed when they get in trouble.