I would say B: A bar graph.
definitely not c or d
Answer:
Change in the species structure of an ecological community over time. (A)
Explanation: Google
Blood needs to flow faster around the body in order to supply the muscles with oxygen for respiration
Answer:
b. Vernalization
Explanation:
Vernalization is a phenomenon in which plants require low temperature for the flowering. There is either qualitatively or quantitatively dependent on exposure to very low temperature. This process is known as vernalization. Vernalization defines especially to the promotion of flowering by a period of low climate. For example; Vernalisation occurs in biennial plants. Biennials are monocarpic plants which normally flower and may die in the second season. Some common examples of biennials are carrots, Sugarbeet, cabbages, etc.