Question

3. The hard covering of a snail's body d. The organ that helps a fish move upwards or downwards while swimming ninal al cord​

Answer 1

Answer:

swim bladder

Explanation:

when the swim bladder across in ward which is basically like in air flated ballon that can expands and contract depending on how much gas is inside.

when the swim bladder expands it will increase in volume and therefore displace more water.

this increase the fish buoyancy and it will float