Which skill, if it cannot be performed by a 3-year-old child, should alert the nurse that the child may be developmentally delayed?

3-year old child should effectively do motor movements such as:

•Using a spoon,

•Walk up and down stairs,

•Walk forward and backward,

•Climb,

•Throw and catch a ball,

•Run and ride a tricycle.

Also, at this age, child will develop rapidly, improve its language skills, build relationships and develop imagination.

the statements that apply here about binary star system are

"have stars that might appear to wobble"

"often have one star that is brighter than other"

a binary star is a star system consisting of two stars revolving around their common barycenter. systems of two or more stars are called multiple star systems.