Plz ! when you exercise, your muscles are hard at work! to allow your muscles to do all that work, they need more nutrients and oxygen delivered to them so they will have the energy they need. which body system supply them with those necessary things? a. digestive and respiratory b. circulatory and respiratory c. circulatory and excretory d. respiratory and skeletal

This is a type pf behavior that animals are born with and them to survive

Imagine a rocket launching from earth and travelling to the moon. in which order would the rocket pass through the layers of the atmosphere? thermosphere, mesosphere, stratosphere, troposphere troposphere, mesosphere, stratosphere, troposphere thermosphere, stratosphere, mesosphere, troposphere troposphere, stratosphere, mesosphere, thermosphere

Choose one animal (cheetas) and research on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.