Why do parents and doctors get worried if a child gets a head or a spinal injury

parents and doctors get very worried if a child gets a head or spinal injury because the spinal cord supports the whole body. So, if any damage is done than the child may become disable. Its the same case with a head injury. Brain cells cannot reproduce, so if there is any damage done it is permanent.

Explanation:

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.

i wish i could with all of them i can barley see the first one so here's the answer to the first one b