I would say "B', as polar bears don't actually have to get in water at all!
It would be generation 5 in which there will be almost 100% non-singing females if there are no changes in the birds’ environment and interactions
To help reduce amount of CO2 emissions you could start by:
Walking or cycling to near distances instead of driving. It could be a win-win, you saving money on gas and helping the planet. By walking it'll help us stay active especially for lazy people "me." Recyling and reusing house hold items is another stradegy. Throwing any cans, news papers, plastic bottles, or cardboard objects into a recyling bin will help by reducing the amount of garbage getting tossed in waste lands.
Dolphins eat the equivalent of 4-5% of their body mass each day. The sonar frequency most often used by thedolphins is around 100kHz. Notice thequalitative data are descriptions. Thequantitative data are objective, numerical measurements.
3. Heart (The heart pumps oxygen thro our entire body, continuously)
4. Blood Vessels (In humans, nutrients are carried thro blood vessels)
I hope that helps!
