What source of fuel is used by the body during long periods of low-intensity exercise, such as a day-long hike?

The fatty acids stored in the adipose tissues.

Explanation:

The adipose tissues are connective tissues that consist fat cells known as the adipocytes.

They are found all around the body. Those that are found under the skin are subcutaneous fat, while those that are found in the abdominal cavity, around the internal organs are visceral fats.

The adipose tissues store energy in form of fat, and insulate the body.

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: