1 El sistema esquelético se compone de
huesos, que son la parte más resistente
del cuerpo humano. ¿Cuál
característica explica MEJOR por qué
los huesos facilitan los movimientos
del cuerpo humano?
A Son ligeros.
B Son pequeños.
C Tienen articulaciones.
D Tienen células flexibles.

answer: 45

explanationyou have to add as well to be it could be

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.

the answer is d. embryo

answerlength of time the medication is in contact with the skin(moistur level of the skin) depth of respirations blood supply to the area; all of the above; ///