Pretty sure that the endocrine system is represented by the diagram
So the answer is endocrine
The statement given in this question is TRUE; Some animals in grassland can obtain the water they need from plants.
Grassland is a biome that is characterized by wide range of temperature and uniform distribution of rainfall all through the year. The major plants found in the biome are grasses and herbs. The soil in the biome is not fertile enough for trees to survive there. Different animals can be found in the biome and some of the animals has drought resistance capacity. Some of these animals obtain their water requirement from the grasses, which they consume.
Products of aerobic respiration would be water and carbon dioxide
By reading the graph, it will tell you that there is a 13-14 hour period between high tides, so your best guess is 13