Heyy hmu with those answers hehe which trait shared by dolphins and bats possibly lead to the evolution of echolocation in these two animal groups? a) the need to move quickly through dark environments b) the need to be able to send sound waves through the air c) the need to be able to send sound waves through the water d) the need to communicate with other species through echolocation

A) the need to move quickly through dark environments

Explanation:

Both Dolphins and Bats have to create a system of echolocation because they needed a way to move on dark environmnets where they couldn´t see well enough, and the echolocation helped them to ubicate themselves through waves and reflection of those waves this created a new pair of "eyes" for them.

a

Explanation:

more than, less

less than, more

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.