Help me solve 4 , 5 , 6 its in the picture

i cant draw or do the first one. 2nd one The path that oxygen takes through the respiratory system is identified below in a flowchart format:

Mouth or Nostrils of the Nose → Nasopharynx → Oral Pharynx → Glottis → Trachea → Lungs (Right and Left Bronchi → Bronchioles → Alveoli)

and the last one: Insects that walk on water are taking advantage of this surface tension. Surface tension causes water to clump in drops rather than spreading out in a thin layer. It also allows water to move through plant roots and stems, thermometers, and the smallest blood vessels in your body. As one molecule moves up, it ‘pulls’ the others with it.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.