How does an octopus or a squid uses newton's third law of motion to escape from enemies

Why does karst topography exist in some geographic location? a. few climates have enough oxygen b. most regions have rock layers other than limestone c. in most regions, the soil is too thin d. the water is too acidic enough in most places

Aphase diagram assumes is kept constant.

How can a cyclist's acceleration change even if its velocity remains constant?