"Body composition assessment is a physical test that measures the proportion of the various components of a person's body. The human body is comprised of water, protein, fat, and minerals, but for most purposes, it is the level of fat compared to lean mass that is of interest. In general, most body composition analysis tests measure the ratio of fat to lean tissue. Body fat, or adipose tissue,
has chemical and physical properties that allow for a number of analytical methods, each with its own advantages and limitations."
information from chacha .com
Both the nervous and endocrine systems play a vital role in the survival of a person. They send messages to target areas in order to support life. The messages sent by the nervous system which are being released into a synapse are called neurotransmitters while the ones sent by the endocrine system via the bloodstream are called hormones.
It is a fitness portfolio is the answer.
option d. Ned volunteers to pick up garbage every Saturday, which helps clean up his community
The rest of the choices doesn't match what is asked. I chose option d. because by picking up garbage is of the ways that could contribute the cleanliness of the environment. Small actions bring big transcendence towards other people and in that way encourage others to take good part as well.
Answer:
1920s and 1930s,
Explanation:
it's worth reiterating that helmets were not mandatory. That wouldn't happen until 1943. During the 1920s and 1930s, variations of the leather helmet appeared, but in 1939, the game changed –or at least became safer– when John T. Riddel introduced the first plastic helmet
