In class, you explored an example of animal-environment interactions, in which elephants in Botswana help to shape their environment in the Okavango River Delta. Which of the following is true about the animal-environment interactions involving elephants in Botswana? More than one answer may be at least partially correct; from what you learned in this course so far, please choose the answer below that is the most correct_____
a. The elephants need the water in the delta and the food provided by the palm nuts; meanwhile, their movements carve out new channels, and they help palm islands to grow by digesting and distributing palm seeds.
b. Elephants, through their digging and excavation activities, break down channels and cause erosion in the Okavango River Delta.
c. The elephants began to die off in 2020 due to a disease they contracted from harmful algae blooms in their environment.
d. Elephants are large animals that drink a large quantity water from the delta channels, causing it to dry up each season.